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Finding the Fourth Proportional to 424,201.82, 636,326.28 and 139,880.88

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Solution

The fourth proportional to 424,201.82, 636,326.28 and 139,880.88 is: 209,829.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,201.82 : 636,326.28 = 139,880.88 : x
  2. Step 2: Convert to fraction form
    424,201.82/636,326.28 = 139,880.88/x
  3. Step 3: Cross multiply
    424,201.82x = 636,326.28 × 139,880.88
  4. Step 4: Simplify right side
    424,201.82x = 89,009,880,013.53
  5. Step 5: Solve for x
    x = 89,009,880,013.53/424,201.82
  6. Step 6: Final answer
    x = 209,829.09

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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.