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Finding the Fourth Proportional to 517.59, 709.61 and 508.38

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Solution

The fourth proportional to 517.59, 709.61 and 508.38 is: 696.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.59 : 709.61 = 508.38 : x
  2. Step 2: Convert to fraction form
    517.59/709.61 = 508.38/x
  3. Step 3: Cross multiply
    517.59x = 709.61 × 508.38
  4. Step 4: Simplify right side
    517.59x = 360,749.19
  5. Step 5: Solve for x
    x = 360,749.19/517.59
  6. Step 6: Final answer
    x = 696.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.