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Finding the Fourth Proportional to 981.03, 1,354.04 and 767.92

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Solution

The fourth proportional to 981.03, 1,354.04 and 767.92 is: 1,059.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.03 : 1,354.04 = 767.92 : x
  2. Step 2: Convert to fraction form
    981.03/1,354.04 = 767.92/x
  3. Step 3: Cross multiply
    981.03x = 1,354.04 × 767.92
  4. Step 4: Simplify right side
    981.03x = 1,039,798.56
  5. Step 5: Solve for x
    x = 1,039,798.56/981.03
  6. Step 6: Final answer
    x = 1,059.90

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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.