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Finding the Fourth Proportional to 983.67, 1,358.03 and 652.55

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Solution

The fourth proportional to 983.67, 1,358.03 and 652.55 is: 900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.67 : 1,358.03 = 652.55 : x
  2. Step 2: Convert to fraction form
    983.67/1,358.03 = 652.55/x
  3. Step 3: Cross multiply
    983.67x = 1,358.03 × 652.55
  4. Step 4: Simplify right side
    983.67x = 886,172.42
  5. Step 5: Solve for x
    x = 886,172.42/983.67
  6. Step 6: Final answer
    x = 900.88

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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.