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Finding the Fourth Proportional to 579,978,913.80, 869,968,370.70 and 557,683,566.60

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Solution

The fourth proportional to 579,978,913.80, 869,968,370.70 and 557,683,566.60 is: 836,525,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,978,913.80 : 869,968,370.70 = 557,683,566.60 : x
  2. Step 2: Convert to fraction form
    579,978,913.80/869,968,370.70 = 557,683,566.60/x
  3. Step 3: Cross multiply
    579,978,913.80x = 869,968,370.70 × 557,683,566.60
  4. Step 4: Simplify right side
    579,978,913.80x = 485,167,063,801,166,976
  5. Step 5: Solve for x
    x = 485,167,063,801,166,976/579,978,913.80
  6. Step 6: Final answer
    x = 836,525,349.90

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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.