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Finding the Fourth Proportional to 424,421.76, 636,711.21 and 140,132.11

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Solution

The fourth proportional to 424,421.76, 636,711.21 and 140,132.11 is: 210,224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,421.76 : 636,711.21 = 140,132.11 : x
  2. Step 2: Convert to fraction form
    424,421.76/636,711.21 = 140,132.11/x
  3. Step 3: Cross multiply
    424,421.76x = 636,711.21 × 140,132.11
  4. Step 4: Simplify right side
    424,421.76x = 89,223,685,317.95
  5. Step 5: Solve for x
    x = 89,223,685,317.95/424,421.76
  6. Step 6: Final answer
    x = 210,224.11

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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.