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Finding the Fourth Proportional to 1,000.48, 1,381.48 and 741.28

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Solution

The fourth proportional to 1,000.48, 1,381.48 and 741.28 is: 1,023.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.48 : 1,381.48 = 741.28 : x
  2. Step 2: Convert to fraction form
    1,000.48/1,381.48 = 741.28/x
  3. Step 3: Cross multiply
    1,000.48x = 1,381.48 × 741.28
  4. Step 4: Simplify right side
    1,000.48x = 1,024,063.49
  5. Step 5: Solve for x
    x = 1,024,063.49/1,000.48
  6. Step 6: Final answer
    x = 1,023.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.