Home / 1,537.28-2,121.13-977.55

Finding the Fourth Proportional to 1,537.28, 2,121.13 and 977.55

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Solution

The fourth proportional to 1,537.28, 2,121.13 and 977.55 is: 1,348.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.28 : 2,121.13 = 977.55 : x
  2. Step 2: Convert to fraction form
    1,537.28/2,121.13 = 977.55/x
  3. Step 3: Cross multiply
    1,537.28x = 2,121.13 × 977.55
  4. Step 4: Simplify right side
    1,537.28x = 2,073,510.63
  5. Step 5: Solve for x
    x = 2,073,510.63/1,537.28
  6. Step 6: Final answer
    x = 1,348.82

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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.