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Finding the Fourth Proportional to 478.72, 717.68 and 456.04

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Solution

The fourth proportional to 478.72, 717.68 and 456.04 is: 683.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.72 : 717.68 = 456.04 : x
  2. Step 2: Convert to fraction form
    478.72/717.68 = 456.04/x
  3. Step 3: Cross multiply
    478.72x = 717.68 × 456.04
  4. Step 4: Simplify right side
    478.72x = 327,290.79
  5. Step 5: Solve for x
    x = 327,290.79/478.72
  6. Step 6: Final answer
    x = 683.68

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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.