Home / 1,757.38-2,428.11-1,387.20

Finding the Fourth Proportional to 1,757.38, 2,428.11 and 1,387.20

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Solution

The fourth proportional to 1,757.38, 2,428.11 and 1,387.20 is: 1,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.38 : 2,428.11 = 1,387.20 : x
  2. Step 2: Convert to fraction form
    1,757.38/2,428.11 = 1,387.20/x
  3. Step 3: Cross multiply
    1,757.38x = 2,428.11 × 1,387.20
  4. Step 4: Simplify right side
    1,757.38x = 3,368,274.19
  5. Step 5: Solve for x
    x = 3,368,274.19/1,757.38
  6. Step 6: Final answer
    x = 1,916.65

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1.5x scale

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.