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Finding the Fourth Proportional to 1,166.24, 1,748.80 and 679.40

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Solution

The fourth proportional to 1,166.24, 1,748.80 and 679.40 is: 1,018.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.24 : 1,748.80 = 679.40 : x
  2. Step 2: Convert to fraction form
    1,166.24/1,748.80 = 679.40/x
  3. Step 3: Cross multiply
    1,166.24x = 1,748.80 × 679.40
  4. Step 4: Simplify right side
    1,166.24x = 1,188,134.72
  5. Step 5: Solve for x
    x = 1,188,134.72/1,166.24
  6. Step 6: Final answer
    x = 1,018.77

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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.