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Finding the Fourth Proportional to 424,208.22, 636,335.82 and 139,887.30

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Solution

The fourth proportional to 424,208.22, 636,335.82 and 139,887.30 is: 209,838.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,208.22 : 636,335.82 = 139,887.30 : x
  2. Step 2: Convert to fraction form
    424,208.22/636,335.82 = 139,887.30/x
  3. Step 3: Cross multiply
    424,208.22x = 636,335.82 × 139,887.30
  4. Step 4: Simplify right side
    424,208.22x = 89,015,299,753.09
  5. Step 5: Solve for x
    x = 89,015,299,753.09/424,208.22
  6. Step 6: Final answer
    x = 209,838.70

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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.