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Finding the Fourth Proportional to 968.67, 1,452.20 and 420.71

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Solution

The fourth proportional to 968.67, 1,452.20 and 420.71 is: 630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.67 : 1,452.20 = 420.71 : x
  2. Step 2: Convert to fraction form
    968.67/1,452.20 = 420.71/x
  3. Step 3: Cross multiply
    968.67x = 1,452.20 × 420.71
  4. Step 4: Simplify right side
    968.67x = 610,945.70
  5. Step 5: Solve for x
    x = 610,945.70/968.67
  6. Step 6: Final answer
    x = 630.71

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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.