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Finding the Fourth Proportional to 516.08, 711.12 and 515.12

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Solution

The fourth proportional to 516.08, 711.12 and 515.12 is: 709.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.08 : 711.12 = 515.12 : x
  2. Step 2: Convert to fraction form
    516.08/711.12 = 515.12/x
  3. Step 3: Cross multiply
    516.08x = 711.12 × 515.12
  4. Step 4: Simplify right side
    516.08x = 366,312.13
  5. Step 5: Solve for x
    x = 366,312.13/516.08
  6. Step 6: Final answer
    x = 709.80

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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.