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Finding the Fourth Proportional to 1,252.40, 1,879.32 and 559.52

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Solution

The fourth proportional to 1,252.40, 1,879.32 and 559.52 is: 839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.40 : 1,879.32 = 559.52 : x
  2. Step 2: Convert to fraction form
    1,252.40/1,879.32 = 559.52/x
  3. Step 3: Cross multiply
    1,252.40x = 1,879.32 × 559.52
  4. Step 4: Simplify right side
    1,252.40x = 1,051,517.13
  5. Step 5: Solve for x
    x = 1,051,517.13/1,252.40
  6. Step 6: Final answer
    x = 839.60

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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.