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Finding the Fourth Proportional to 1,030.54, 1,545.59 and 380.83

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Solution

The fourth proportional to 1,030.54, 1,545.59 and 380.83 is: 571.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.54 : 1,545.59 = 380.83 : x
  2. Step 2: Convert to fraction form
    1,030.54/1,545.59 = 380.83/x
  3. Step 3: Cross multiply
    1,030.54x = 1,545.59 × 380.83
  4. Step 4: Simplify right side
    1,030.54x = 588,597.41
  5. Step 5: Solve for x
    x = 588,597.41/1,030.54
  6. Step 6: Final answer
    x = 571.16

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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.