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Finding the Fourth Proportional to 716.39, 1,074.68 and 283.45

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Solution

The fourth proportional to 716.39, 1,074.68 and 283.45 is: 425.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.39 : 1,074.68 = 283.45 : x
  2. Step 2: Convert to fraction form
    716.39/1,074.68 = 283.45/x
  3. Step 3: Cross multiply
    716.39x = 1,074.68 × 283.45
  4. Step 4: Simplify right side
    716.39x = 304,618.05
  5. Step 5: Solve for x
    x = 304,618.05/716.39
  6. Step 6: Final answer
    x = 425.21

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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.