Home / 1,177.40-1,748.70-1,155.80

Finding the Fourth Proportional to 1,177.40, 1,748.70 and 1,155.80

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Solution

The fourth proportional to 1,177.40, 1,748.70 and 1,155.80 is: 1,716.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.40 : 1,748.70 = 1,155.80 : x
  2. Step 2: Convert to fraction form
    1,177.40/1,748.70 = 1,155.80/x
  3. Step 3: Cross multiply
    1,177.40x = 1,748.70 × 1,155.80
  4. Step 4: Simplify right side
    1,177.40x = 2,021,147.46
  5. Step 5: Solve for x
    x = 2,021,147.46/1,177.40
  6. Step 6: Final answer
    x = 1,716.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.