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Finding the Fourth Proportional to 626.40, 938.99 and 479.70

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Solution

The fourth proportional to 626.40, 938.99 and 479.70 is: 719.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.40 : 938.99 = 479.70 : x
  2. Step 2: Convert to fraction form
    626.40/938.99 = 479.70/x
  3. Step 3: Cross multiply
    626.40x = 938.99 × 479.70
  4. Step 4: Simplify right side
    626.40x = 450,434.70
  5. Step 5: Solve for x
    x = 450,434.70/626.40
  6. Step 6: Final answer
    x = 719.08

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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.