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Finding the Fourth Proportional to 566.96, 781.48 and 478.68

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Solution

The fourth proportional to 566.96, 781.48 and 478.68 is: 659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.96 : 781.48 = 478.68 : x
  2. Step 2: Convert to fraction form
    566.96/781.48 = 478.68/x
  3. Step 3: Cross multiply
    566.96x = 781.48 × 478.68
  4. Step 4: Simplify right side
    566.96x = 374,078.85
  5. Step 5: Solve for x
    x = 374,078.85/566.96
  6. Step 6: Final answer
    x = 659.80

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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.