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Finding the Fourth Proportional to 1,502, 2,251.20 and 807.20

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Solution

The fourth proportional to 1,502, 2,251.20 and 807.20 is: 1,209.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502 : 2,251.20 = 807.20 : x
  2. Step 2: Convert to fraction form
    1,502/2,251.20 = 807.20/x
  3. Step 3: Cross multiply
    1,502x = 2,251.20 × 807.20
  4. Step 4: Simplify right side
    1,502x = 1,817,168.64
  5. Step 5: Solve for x
    x = 1,817,168.64/1,502
  6. Step 6: Final answer
    x = 1,209.83

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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.