Home / 579,388,000.40-869,082,000.60-395,721,990.80

Finding the Fourth Proportional to 579,388,000.40, 869,082,000.60 and 395,721,990.80

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Solution

The fourth proportional to 579,388,000.40, 869,082,000.60 and 395,721,990.80 is: 593,582,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,388,000.40 : 869,082,000.60 = 395,721,990.80 : x
  2. Step 2: Convert to fraction form
    579,388,000.40/869,082,000.60 = 395,721,990.80/x
  3. Step 3: Cross multiply
    579,388,000.40x = 869,082,000.60 × 395,721,990.80
  4. Step 4: Simplify right side
    579,388,000.40x = 343,914,859,445,878,784
  5. Step 5: Solve for x
    x = 343,914,859,445,878,784/579,388,000.40
  6. Step 6: Final answer
    x = 593,582,986.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.