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Finding the Fourth Proportional to 1,478.60, 2,217.89 and 504.71

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Solution

The fourth proportional to 1,478.60, 2,217.89 and 504.71 is: 757.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.60 : 2,217.89 = 504.71 : x
  2. Step 2: Convert to fraction form
    1,478.60/2,217.89 = 504.71/x
  3. Step 3: Cross multiply
    1,478.60x = 2,217.89 × 504.71
  4. Step 4: Simplify right side
    1,478.60x = 1,119,381.43
  5. Step 5: Solve for x
    x = 1,119,381.43/1,478.60
  6. Step 6: Final answer
    x = 757.06

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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.