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Finding the Fourth Proportional to 717.14, 989.72 and 437.38

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Solution

The fourth proportional to 717.14, 989.72 and 437.38 is: 603.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.14 : 989.72 = 437.38 : x
  2. Step 2: Convert to fraction form
    717.14/989.72 = 437.38/x
  3. Step 3: Cross multiply
    717.14x = 989.72 × 437.38
  4. Step 4: Simplify right side
    717.14x = 432,883.73
  5. Step 5: Solve for x
    x = 432,883.73/717.14
  6. Step 6: Final answer
    x = 603.63

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Double scale
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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.