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Finding the Fourth Proportional to 968.42, 1,451.86 and 420.22

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Solution

The fourth proportional to 968.42, 1,451.86 and 420.22 is: 630.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.42 : 1,451.86 = 420.22 : x
  2. Step 2: Convert to fraction form
    968.42/1,451.86 = 420.22/x
  3. Step 3: Cross multiply
    968.42x = 1,451.86 × 420.22
  4. Step 4: Simplify right side
    968.42x = 610,100.61
  5. Step 5: Solve for x
    x = 610,100.61/968.42
  6. Step 6: Final answer
    x = 630.00

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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.