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Finding the Fourth Proportional to 968.34, 1,452.36 and 420.50

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Solution

The fourth proportional to 968.34, 1,452.36 and 420.50 is: 630.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.34 : 1,452.36 = 420.50 : x
  2. Step 2: Convert to fraction form
    968.34/1,452.36 = 420.50/x
  3. Step 3: Cross multiply
    968.34x = 1,452.36 × 420.50
  4. Step 4: Simplify right side
    968.34x = 610,717.38
  5. Step 5: Solve for x
    x = 610,717.38/968.34
  6. Step 6: Final answer
    x = 630.68

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Double scale
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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.