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Finding the Fourth Proportional to 717.54, 990.30 and 437.86

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Solution

The fourth proportional to 717.54, 990.30 and 437.86 is: 604.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.54 : 990.30 = 437.86 : x
  2. Step 2: Convert to fraction form
    717.54/990.30 = 437.86/x
  3. Step 3: Cross multiply
    717.54x = 990.30 × 437.86
  4. Step 4: Simplify right side
    717.54x = 433,612.76
  5. Step 5: Solve for x
    x = 433,612.76/717.54
  6. Step 6: Final answer
    x = 604.30

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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.