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Finding the Fourth Proportional to 668,508.88, 922,393.02 and 396,438.52

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Solution

The fourth proportional to 668,508.88, 922,393.02 and 396,438.52 is: 546,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,508.88 : 922,393.02 = 396,438.52 : x
  2. Step 2: Convert to fraction form
    668,508.88/922,393.02 = 396,438.52/x
  3. Step 3: Cross multiply
    668,508.88x = 922,393.02 × 396,438.52
  4. Step 4: Simplify right side
    668,508.88x = 365,672,123,707.13
  5. Step 5: Solve for x
    x = 365,672,123,707.13/668,508.88
  6. Step 6: Final answer
    x = 546,996.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.