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Finding the Fourth Proportional to 951.50, 1,426.55 and 642.49

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Solution

The fourth proportional to 951.50, 1,426.55 and 642.49 is: 963.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.50 : 1,426.55 = 642.49 : x
  2. Step 2: Convert to fraction form
    951.50/1,426.55 = 642.49/x
  3. Step 3: Cross multiply
    951.50x = 1,426.55 × 642.49
  4. Step 4: Simplify right side
    951.50x = 916,537.33
  5. Step 5: Solve for x
    x = 916,537.33/951.50
  6. Step 6: Final answer
    x = 963.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.