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Finding the Fourth Proportional to 968.55, 1,442.88 and 922.11

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Solution

The fourth proportional to 968.55, 1,442.88 and 922.11 is: 1,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.55 : 1,442.88 = 922.11 : x
  2. Step 2: Convert to fraction form
    968.55/1,442.88 = 922.11/x
  3. Step 3: Cross multiply
    968.55x = 1,442.88 × 922.11
  4. Step 4: Simplify right side
    968.55x = 1,330,494.08
  5. Step 5: Solve for x
    x = 1,330,494.08/968.55
  6. Step 6: Final answer
    x = 1,373.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.