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Finding the Fourth Proportional to 968.52, 1,453.05 and 420.57

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Solution

The fourth proportional to 968.52, 1,453.05 and 420.57 is: 630.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.52 : 1,453.05 = 420.57 : x
  2. Step 2: Convert to fraction form
    968.52/1,453.05 = 420.57/x
  3. Step 3: Cross multiply
    968.52x = 1,453.05 × 420.57
  4. Step 4: Simplify right side
    968.52x = 611,109.24
  5. Step 5: Solve for x
    x = 611,109.24/968.52
  6. Step 6: Final answer
    x = 630.97

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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.