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Finding the Fourth Proportional to 1,030.07, 1,545.68 and 413.61

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Solution

The fourth proportional to 1,030.07, 1,545.68 and 413.61 is: 620.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.07 : 1,545.68 = 413.61 : x
  2. Step 2: Convert to fraction form
    1,030.07/1,545.68 = 413.61/x
  3. Step 3: Cross multiply
    1,030.07x = 1,545.68 × 413.61
  4. Step 4: Simplify right side
    1,030.07x = 639,309.74
  5. Step 5: Solve for x
    x = 639,309.74/1,030.07
  6. Step 6: Final answer
    x = 620.65

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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.