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Finding the Fourth Proportional to 518,327.11, 777,502.97 and 139,248.33

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Solution

The fourth proportional to 518,327.11, 777,502.97 and 139,248.33 is: 208,875.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,327.11 : 777,502.97 = 139,248.33 : x
  2. Step 2: Convert to fraction form
    518,327.11/777,502.97 = 139,248.33/x
  3. Step 3: Cross multiply
    518,327.11x = 777,502.97 × 139,248.33
  4. Step 4: Simplify right side
    518,327.11x = 108,265,985,906.90
  5. Step 5: Solve for x
    x = 108,265,985,906.90/518,327.11
  6. Step 6: Final answer
    x = 208,875.79

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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.