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Finding the Fourth Proportional to 1,165.84, 1,750 and 1,139.72

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Solution

The fourth proportional to 1,165.84, 1,750 and 1,139.72 is: 1,710.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.84 : 1,750 = 1,139.72 : x
  2. Step 2: Convert to fraction form
    1,165.84/1,750 = 1,139.72/x
  3. Step 3: Cross multiply
    1,165.84x = 1,750 × 1,139.72
  4. Step 4: Simplify right side
    1,165.84x = 1,994,510
  5. Step 5: Solve for x
    x = 1,994,510/1,165.84
  6. Step 6: Final answer
    x = 1,710.79

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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.