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Finding the Fourth Proportional to 716.68, 1,069.61 and 630.46

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Solution

The fourth proportional to 716.68, 1,069.61 and 630.46 is: 940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.68 : 1,069.61 = 630.46 : x
  2. Step 2: Convert to fraction form
    716.68/1,069.61 = 630.46/x
  3. Step 3: Cross multiply
    716.68x = 1,069.61 × 630.46
  4. Step 4: Simplify right side
    716.68x = 674,346.32
  5. Step 5: Solve for x
    x = 674,346.32/716.68
  6. Step 6: Final answer
    x = 940.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.