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Finding the Fourth Proportional to 1,029.67, 1,545.45 and 413.80

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Solution

The fourth proportional to 1,029.67, 1,545.45 and 413.80 is: 621.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.67 : 1,545.45 = 413.80 : x
  2. Step 2: Convert to fraction form
    1,029.67/1,545.45 = 413.80/x
  3. Step 3: Cross multiply
    1,029.67x = 1,545.45 × 413.80
  4. Step 4: Simplify right side
    1,029.67x = 639,507.21
  5. Step 5: Solve for x
    x = 639,507.21/1,029.67
  6. Step 6: Final answer
    x = 621.08

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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.