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Finding the Fourth Proportional to 968.64, 1,454.18 and 661.25

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Solution

The fourth proportional to 968.64, 1,454.18 and 661.25 is: 992.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.64 : 1,454.18 = 661.25 : x
  2. Step 2: Convert to fraction form
    968.64/1,454.18 = 661.25/x
  3. Step 3: Cross multiply
    968.64x = 1,454.18 × 661.25
  4. Step 4: Simplify right side
    968.64x = 961,565.95
  5. Step 5: Solve for x
    x = 961,565.95/968.64
  6. Step 6: Final answer
    x = 992.70

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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.