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Finding the Fourth Proportional to 438,528.80, 658,052.40 and 289,200.80

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Solution

The fourth proportional to 438,528.80, 658,052.40 and 289,200.80 is: 433,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,528.80 : 658,052.40 = 289,200.80 : x
  2. Step 2: Convert to fraction form
    438,528.80/658,052.40 = 289,200.80/x
  3. Step 3: Cross multiply
    438,528.80x = 658,052.40 × 289,200.80
  4. Step 4: Simplify right side
    438,528.80x = 190,309,280,521.92
  5. Step 5: Solve for x
    x = 190,309,280,521.92/438,528.80
  6. Step 6: Final answer
    x = 433,972.14

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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.