Home / 1,434.46-1,977.81-1,115.53

Finding the Fourth Proportional to 1,434.46, 1,977.81 and 1,115.53

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Solution

The fourth proportional to 1,434.46, 1,977.81 and 1,115.53 is: 1,538.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.46 : 1,977.81 = 1,115.53 : x
  2. Step 2: Convert to fraction form
    1,434.46/1,977.81 = 1,115.53/x
  3. Step 3: Cross multiply
    1,434.46x = 1,977.81 × 1,115.53
  4. Step 4: Simplify right side
    1,434.46x = 2,206,306.39
  5. Step 5: Solve for x
    x = 2,206,306.39/1,434.46
  6. Step 6: Final answer
    x = 1,538.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.