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Finding the Fourth Proportional to 1,251.88, 1,879.48 and 1,005.24

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Solution

The fourth proportional to 1,251.88, 1,879.48 and 1,005.24 is: 1,509.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.88 : 1,879.48 = 1,005.24 : x
  2. Step 2: Convert to fraction form
    1,251.88/1,879.48 = 1,005.24/x
  3. Step 3: Cross multiply
    1,251.88x = 1,879.48 × 1,005.24
  4. Step 4: Simplify right side
    1,251.88x = 1,889,328.48
  5. Step 5: Solve for x
    x = 1,889,328.48/1,251.88
  6. Step 6: Final answer
    x = 1,509.19

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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.