Home / 1,354.28-2,031.40-380.38

Finding the Fourth Proportional to 1,354.28, 2,031.40 and 380.38

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Solution

The fourth proportional to 1,354.28, 2,031.40 and 380.38 is: 570.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.28 : 2,031.40 = 380.38 : x
  2. Step 2: Convert to fraction form
    1,354.28/2,031.40 = 380.38/x
  3. Step 3: Cross multiply
    1,354.28x = 2,031.40 × 380.38
  4. Step 4: Simplify right side
    1,354.28x = 772,703.93
  5. Step 5: Solve for x
    x = 772,703.93/1,354.28
  6. Step 6: Final answer
    x = 570.56

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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.