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Finding the Fourth Proportional to 424,319.58, 636,343.25 and 139,946.20

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Solution

The fourth proportional to 424,319.58, 636,343.25 and 139,946.20 is: 209,874.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,319.58 : 636,343.25 = 139,946.20 : x
  2. Step 2: Convert to fraction form
    424,319.58/636,343.25 = 139,946.20/x
  3. Step 3: Cross multiply
    424,319.58x = 636,343.25 × 139,946.20
  4. Step 4: Simplify right side
    424,319.58x = 89,053,819,828.85
  5. Step 5: Solve for x
    x = 89,053,819,828.85/424,319.58
  6. Step 6: Final answer
    x = 209,874.40

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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.