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Finding the Fourth Proportional to 492.70, 737.70 and 479.20

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Solution

The fourth proportional to 492.70, 737.70 and 479.20 is: 717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.70 : 737.70 = 479.20 : x
  2. Step 2: Convert to fraction form
    492.70/737.70 = 479.20/x
  3. Step 3: Cross multiply
    492.70x = 737.70 × 479.20
  4. Step 4: Simplify right side
    492.70x = 353,505.84
  5. Step 5: Solve for x
    x = 353,505.84/492.70
  6. Step 6: Final answer
    x = 717.49

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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.