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Finding the Fourth Proportional to 1,402.87, 2,103.87 and 478.27

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Solution

The fourth proportional to 1,402.87, 2,103.87 and 478.27 is: 717.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.87 : 2,103.87 = 478.27 : x
  2. Step 2: Convert to fraction form
    1,402.87/2,103.87 = 478.27/x
  3. Step 3: Cross multiply
    1,402.87x = 2,103.87 × 478.27
  4. Step 4: Simplify right side
    1,402.87x = 1,006,217.90
  5. Step 5: Solve for x
    x = 1,006,217.90/1,402.87
  6. Step 6: Final answer
    x = 717.26

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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.