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Finding the Fourth Proportional to 663,327.35, 915,276.98 and 391,374.71

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Solution

The fourth proportional to 663,327.35, 915,276.98 and 391,374.71 is: 540,029.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,327.35 : 915,276.98 = 391,374.71 : x
  2. Step 2: Convert to fraction form
    663,327.35/915,276.98 = 391,374.71/x
  3. Step 3: Cross multiply
    663,327.35x = 915,276.98 × 391,374.71
  4. Step 4: Simplify right side
    663,327.35x = 358,216,262,617.18
  5. Step 5: Solve for x
    x = 358,216,262,617.18/663,327.35
  6. Step 6: Final answer
    x = 540,029.39

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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.