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Finding the Fourth Proportional to 1,013.45, 1,397.49 and 659.10

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Solution

The fourth proportional to 1,013.45, 1,397.49 and 659.10 is: 908.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.45 : 1,397.49 = 659.10 : x
  2. Step 2: Convert to fraction form
    1,013.45/1,397.49 = 659.10/x
  3. Step 3: Cross multiply
    1,013.45x = 1,397.49 × 659.10
  4. Step 4: Simplify right side
    1,013.45x = 921,088.43
  5. Step 5: Solve for x
    x = 921,088.43/1,013.45
  6. Step 6: Final answer
    x = 908.87

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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.