Home / 2,869.35-4,304.70-921.57

Finding the Fourth Proportional to 2,869.35, 4,304.70 and 921.57

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Solution

The fourth proportional to 2,869.35, 4,304.70 and 921.57 is: 1,382.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.35 : 4,304.70 = 921.57 : x
  2. Step 2: Convert to fraction form
    2,869.35/4,304.70 = 921.57/x
  3. Step 3: Cross multiply
    2,869.35x = 4,304.70 × 921.57
  4. Step 4: Simplify right side
    2,869.35x = 3,967,082.38
  5. Step 5: Solve for x
    x = 3,967,082.38/2,869.35
  6. Step 6: Final answer
    x = 1,382.57

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1.5x scale

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.