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Finding the Fourth Proportional to 1,000.17, 1,381.19 and 945.63

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Solution

The fourth proportional to 1,000.17, 1,381.19 and 945.63 is: 1,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.17 : 1,381.19 = 945.63 : x
  2. Step 2: Convert to fraction form
    1,000.17/1,381.19 = 945.63/x
  3. Step 3: Cross multiply
    1,000.17x = 1,381.19 × 945.63
  4. Step 4: Simplify right side
    1,000.17x = 1,306,089.97
  5. Step 5: Solve for x
    x = 1,306,089.97/1,000.17
  6. Step 6: Final answer
    x = 1,305.87

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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.