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Finding the Fourth Proportional to 659.48, 988.22 and 476.68

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Solution

The fourth proportional to 659.48, 988.22 and 476.68 is: 714.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.48 : 988.22 = 476.68 : x
  2. Step 2: Convert to fraction form
    659.48/988.22 = 476.68/x
  3. Step 3: Cross multiply
    659.48x = 988.22 × 476.68
  4. Step 4: Simplify right side
    659.48x = 471,064.71
  5. Step 5: Solve for x
    x = 471,064.71/659.48
  6. Step 6: Final answer
    x = 714.30

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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.