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Finding the Fourth Proportional to 424,135.40, 636,008.70 and 187,356.20

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Solution

The fourth proportional to 424,135.40, 636,008.70 and 187,356.20 is: 280,948.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,135.40 : 636,008.70 = 187,356.20 : x
  2. Step 2: Convert to fraction form
    424,135.40/636,008.70 = 187,356.20/x
  3. Step 3: Cross multiply
    424,135.40x = 636,008.70 × 187,356.20
  4. Step 4: Simplify right side
    424,135.40x = 119,160,173,198.94
  5. Step 5: Solve for x
    x = 119,160,173,198.94/424,135.40
  6. Step 6: Final answer
    x = 280,948.43

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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.