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Finding the Fourth Proportional to 458,809.10, 687,557.55 and 318,403.70

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Solution

The fourth proportional to 458,809.10, 687,557.55 and 318,403.70 is: 477,150.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,809.10 : 687,557.55 = 318,403.70 : x
  2. Step 2: Convert to fraction form
    458,809.10/687,557.55 = 318,403.70/x
  3. Step 3: Cross multiply
    458,809.10x = 687,557.55 × 318,403.70
  4. Step 4: Simplify right side
    458,809.10x = 218,920,867,882.94
  5. Step 5: Solve for x
    x = 218,920,867,882.94/458,809.10
  6. Step 6: Final answer
    x = 477,150.23

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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.