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Finding the Fourth Proportional to 445,568.90, 668,353.35 and 391,331.30

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Solution

The fourth proportional to 445,568.90, 668,353.35 and 391,331.30 is: 586,996.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,568.90 : 668,353.35 = 391,331.30 : x
  2. Step 2: Convert to fraction form
    445,568.90/668,353.35 = 391,331.30/x
  3. Step 3: Cross multiply
    445,568.90x = 668,353.35 × 391,331.30
  4. Step 4: Simplify right side
    445,568.90x = 261,547,585,314.86
  5. Step 5: Solve for x
    x = 261,547,585,314.86/445,568.90
  6. Step 6: Final answer
    x = 586,996.95

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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.