Home / 1,030.29-1,545.21-380.55

Finding the Fourth Proportional to 1,030.29, 1,545.21 and 380.55

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Solution

The fourth proportional to 1,030.29, 1,545.21 and 380.55 is: 570.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.29 : 1,545.21 = 380.55 : x
  2. Step 2: Convert to fraction form
    1,030.29/1,545.21 = 380.55/x
  3. Step 3: Cross multiply
    1,030.29x = 1,545.21 × 380.55
  4. Step 4: Simplify right side
    1,030.29x = 588,029.67
  5. Step 5: Solve for x
    x = 588,029.67/1,030.29
  6. Step 6: Final answer
    x = 570.74

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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.