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Finding the Fourth Proportional to 725.46, 999.57 and 492.18

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Solution

The fourth proportional to 725.46, 999.57 and 492.18 is: 678.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.46 : 999.57 = 492.18 : x
  2. Step 2: Convert to fraction form
    725.46/999.57 = 492.18/x
  3. Step 3: Cross multiply
    725.46x = 999.57 × 492.18
  4. Step 4: Simplify right side
    725.46x = 491,968.36
  5. Step 5: Solve for x
    x = 491,968.36/725.46
  6. Step 6: Final answer
    x = 678.15

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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.