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Finding the Fourth Proportional to 1,248.28, 1,869.59 and 760.26

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Solution

The fourth proportional to 1,248.28, 1,869.59 and 760.26 is: 1,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.28 : 1,869.59 = 760.26 : x
  2. Step 2: Convert to fraction form
    1,248.28/1,869.59 = 760.26/x
  3. Step 3: Cross multiply
    1,248.28x = 1,869.59 × 760.26
  4. Step 4: Simplify right side
    1,248.28x = 1,421,361.34
  5. Step 5: Solve for x
    x = 1,421,361.34/1,248.28
  6. Step 6: Final answer
    x = 1,138.66

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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.