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Finding the Fourth Proportional to 1,503.28, 2,253.81 and 762.32

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Solution

The fourth proportional to 1,503.28, 2,253.81 and 762.32 is: 1,142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.28 : 2,253.81 = 762.32 : x
  2. Step 2: Convert to fraction form
    1,503.28/2,253.81 = 762.32/x
  3. Step 3: Cross multiply
    1,503.28x = 2,253.81 × 762.32
  4. Step 4: Simplify right side
    1,503.28x = 1,718,115.94
  5. Step 5: Solve for x
    x = 1,718,115.94/1,503.28
  6. Step 6: Final answer
    x = 1,142.91

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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.