Home / 1,390.23-2,082.11-1,171.53

Finding the Fourth Proportional to 1,390.23, 2,082.11 and 1,171.53

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Solution

The fourth proportional to 1,390.23, 2,082.11 and 1,171.53 is: 1,754.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.23 : 2,082.11 = 1,171.53 : x
  2. Step 2: Convert to fraction form
    1,390.23/2,082.11 = 1,171.53/x
  3. Step 3: Cross multiply
    1,390.23x = 2,082.11 × 1,171.53
  4. Step 4: Simplify right side
    1,390.23x = 2,439,248.47
  5. Step 5: Solve for x
    x = 2,439,248.47/1,390.23
  6. Step 6: Final answer
    x = 1,754.56

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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.