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Finding the Fourth Proportional to 717.82, 990.30 and 437.92

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Solution

The fourth proportional to 717.82, 990.30 and 437.92 is: 604.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.82 : 990.30 = 437.92 : x
  2. Step 2: Convert to fraction form
    717.82/990.30 = 437.92/x
  3. Step 3: Cross multiply
    717.82x = 990.30 × 437.92
  4. Step 4: Simplify right side
    717.82x = 433,672.18
  5. Step 5: Solve for x
    x = 433,672.18/717.82
  6. Step 6: Final answer
    x = 604.15

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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.