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Finding the Fourth Proportional to 1,678.37, 2,517.59 and 508.39

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Solution

The fourth proportional to 1,678.37, 2,517.59 and 508.39 is: 762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.37 : 2,517.59 = 508.39 : x
  2. Step 2: Convert to fraction form
    1,678.37/2,517.59 = 508.39/x
  3. Step 3: Cross multiply
    1,678.37x = 2,517.59 × 508.39
  4. Step 4: Simplify right side
    1,678.37x = 1,279,909.70
  5. Step 5: Solve for x
    x = 1,279,909.70/1,678.37
  6. Step 6: Final answer
    x = 762.59

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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.