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Finding the Fourth Proportional to 981.76, 1,354.84 and 588.82

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Solution

The fourth proportional to 981.76, 1,354.84 and 588.82 is: 812.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.76 : 1,354.84 = 588.82 : x
  2. Step 2: Convert to fraction form
    981.76/1,354.84 = 588.82/x
  3. Step 3: Cross multiply
    981.76x = 1,354.84 × 588.82
  4. Step 4: Simplify right side
    981.76x = 797,756.89
  5. Step 5: Solve for x
    x = 797,756.89/981.76
  6. Step 6: Final answer
    x = 812.58

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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.