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Finding the Fourth Proportional to 478,420.59, 717,631.91 and 449,191.34

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Solution

The fourth proportional to 478,420.59, 717,631.91 and 449,191.34 is: 673,787.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,420.59 : 717,631.91 = 449,191.34 : x
  2. Step 2: Convert to fraction form
    478,420.59/717,631.91 = 449,191.34/x
  3. Step 3: Cross multiply
    478,420.59x = 717,631.91 × 449,191.34
  4. Step 4: Simplify right side
    478,420.59x = 322,354,033,445.54
  5. Step 5: Solve for x
    x = 322,354,033,445.54/478,420.59
  6. Step 6: Final answer
    x = 673,787.96

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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.