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Finding the Fourth Proportional to 617.70, 925.20 and 479.67

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Solution

The fourth proportional to 617.70, 925.20 and 479.67 is: 718.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.70 : 925.20 = 479.67 : x
  2. Step 2: Convert to fraction form
    617.70/925.20 = 479.67/x
  3. Step 3: Cross multiply
    617.70x = 925.20 × 479.67
  4. Step 4: Simplify right side
    617.70x = 443,790.68
  5. Step 5: Solve for x
    x = 443,790.68/617.70
  6. Step 6: Final answer
    x = 718.46

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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.