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Finding the Fourth Proportional to 438,581.85, 657,342.95 and 213,605.07

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Solution

The fourth proportional to 438,581.85, 657,342.95 and 213,605.07 is: 320,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,581.85 : 657,342.95 = 213,605.07 : x
  2. Step 2: Convert to fraction form
    438,581.85/657,342.95 = 213,605.07/x
  3. Step 3: Cross multiply
    438,581.85x = 657,342.95 × 213,605.07
  4. Step 4: Simplify right side
    438,581.85x = 140,411,785,780.73
  5. Step 5: Solve for x
    x = 140,411,785,780.73/438,581.85
  6. Step 6: Final answer
    x = 320,149.56

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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.