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Finding the Fourth Proportional to 717.70, 990.54 and 437.99

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Solution

The fourth proportional to 717.70, 990.54 and 437.99 is: 604.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.70 : 990.54 = 437.99 : x
  2. Step 2: Convert to fraction form
    717.70/990.54 = 437.99/x
  3. Step 3: Cross multiply
    717.70x = 990.54 × 437.99
  4. Step 4: Simplify right side
    717.70x = 433,844.42
  5. Step 5: Solve for x
    x = 433,844.42/717.70
  6. Step 6: Final answer
    x = 604.50

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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.