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Finding the Fourth Proportional to 1,724.64, 2,586.42 and 749.76

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Solution

The fourth proportional to 1,724.64, 2,586.42 and 749.76 is: 1,124.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.64 : 2,586.42 = 749.76 : x
  2. Step 2: Convert to fraction form
    1,724.64/2,586.42 = 749.76/x
  3. Step 3: Cross multiply
    1,724.64x = 2,586.42 × 749.76
  4. Step 4: Simplify right side
    1,724.64x = 1,939,194.26
  5. Step 5: Solve for x
    x = 1,939,194.26/1,724.64
  6. Step 6: Final answer
    x = 1,124.41

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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.