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Finding the Fourth Proportional to 724.84, 1,000.28 and 414.36

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Solution

The fourth proportional to 724.84, 1,000.28 and 414.36 is: 571.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.84 : 1,000.28 = 414.36 : x
  2. Step 2: Convert to fraction form
    724.84/1,000.28 = 414.36/x
  3. Step 3: Cross multiply
    724.84x = 1,000.28 × 414.36
  4. Step 4: Simplify right side
    724.84x = 414,476.02
  5. Step 5: Solve for x
    x = 414,476.02/724.84
  6. Step 6: Final answer
    x = 571.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.