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Finding the Fourth Proportional to 1,166.40, 1,751.70 and 1,114.50

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Solution

The fourth proportional to 1,166.40, 1,751.70 and 1,114.50 is: 1,673.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.40 : 1,751.70 = 1,114.50 : x
  2. Step 2: Convert to fraction form
    1,166.40/1,751.70 = 1,114.50/x
  3. Step 3: Cross multiply
    1,166.40x = 1,751.70 × 1,114.50
  4. Step 4: Simplify right side
    1,166.40x = 1,952,269.65
  5. Step 5: Solve for x
    x = 1,952,269.65/1,166.40
  6. Step 6: Final answer
    x = 1,673.76

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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.