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Finding the Fourth Proportional to 709.48, 1,064.70 and 344.32

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Solution

The fourth proportional to 709.48, 1,064.70 and 344.32 is: 516.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.48 : 1,064.70 = 344.32 : x
  2. Step 2: Convert to fraction form
    709.48/1,064.70 = 344.32/x
  3. Step 3: Cross multiply
    709.48x = 1,064.70 × 344.32
  4. Step 4: Simplify right side
    709.48x = 366,597.50
  5. Step 5: Solve for x
    x = 366,597.50/709.48
  6. Step 6: Final answer
    x = 516.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.