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Finding the Fourth Proportional to 981.06, 1,353.72 and 588

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Solution

The fourth proportional to 981.06, 1,353.72 and 588 is: 811.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.06 : 1,353.72 = 588 : x
  2. Step 2: Convert to fraction form
    981.06/1,353.72 = 588/x
  3. Step 3: Cross multiply
    981.06x = 1,353.72 × 588
  4. Step 4: Simplify right side
    981.06x = 795,987.36
  5. Step 5: Solve for x
    x = 795,987.36/981.06
  6. Step 6: Final answer
    x = 811.35

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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.