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Finding the Fourth Proportional to 709.92, 979.79 and 534.96

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Solution

The fourth proportional to 709.92, 979.79 and 534.96 is: 738.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.92 : 979.79 = 534.96 : x
  2. Step 2: Convert to fraction form
    709.92/979.79 = 534.96/x
  3. Step 3: Cross multiply
    709.92x = 979.79 × 534.96
  4. Step 4: Simplify right side
    709.92x = 524,145.78
  5. Step 5: Solve for x
    x = 524,145.78/709.92
  6. Step 6: Final answer
    x = 738.32

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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.