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Finding the Fourth Proportional to 1,256.24, 1,883.84 and 708.72

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Solution

The fourth proportional to 1,256.24, 1,883.84 and 708.72 is: 1,062.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.24 : 1,883.84 = 708.72 : x
  2. Step 2: Convert to fraction form
    1,256.24/1,883.84 = 708.72/x
  3. Step 3: Cross multiply
    1,256.24x = 1,883.84 × 708.72
  4. Step 4: Simplify right side
    1,256.24x = 1,335,115.08
  5. Step 5: Solve for x
    x = 1,335,115.08/1,256.24
  6. Step 6: Final answer
    x = 1,062.79

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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.