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Finding the Fourth Proportional to 717.53, 990.20 and 437.77

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Solution

The fourth proportional to 717.53, 990.20 and 437.77 is: 604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.53 : 990.20 = 437.77 : x
  2. Step 2: Convert to fraction form
    717.53/990.20 = 437.77/x
  3. Step 3: Cross multiply
    717.53x = 990.20 × 437.77
  4. Step 4: Simplify right side
    717.53x = 433,479.85
  5. Step 5: Solve for x
    x = 433,479.85/717.53
  6. Step 6: Final answer
    x = 604.13

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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.