Home / 1,029.20-1,543.95-379.89

Finding the Fourth Proportional to 1,029.20, 1,543.95 and 379.89

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Solution

The fourth proportional to 1,029.20, 1,543.95 and 379.89 is: 569.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.20 : 1,543.95 = 379.89 : x
  2. Step 2: Convert to fraction form
    1,029.20/1,543.95 = 379.89/x
  3. Step 3: Cross multiply
    1,029.20x = 1,543.95 × 379.89
  4. Step 4: Simplify right side
    1,029.20x = 586,523.45
  5. Step 5: Solve for x
    x = 586,523.45/1,029.20
  6. Step 6: Final answer
    x = 569.88

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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.