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Finding the Fourth Proportional to 1,251.87, 1,877.93 and 430.04

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Solution

The fourth proportional to 1,251.87, 1,877.93 and 430.04 is: 645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.87 : 1,877.93 = 430.04 : x
  2. Step 2: Convert to fraction form
    1,251.87/1,877.93 = 430.04/x
  3. Step 3: Cross multiply
    1,251.87x = 1,877.93 × 430.04
  4. Step 4: Simplify right side
    1,251.87x = 807,576.70
  5. Step 5: Solve for x
    x = 807,576.70/1,251.87
  6. Step 6: Final answer
    x = 645.10

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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.