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Finding the Fourth Proportional to 3,413.80, 5,113.02 and 3,139.24

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Solution

The fourth proportional to 3,413.80, 5,113.02 and 3,139.24 is: 4,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,413.80 : 5,113.02 = 3,139.24 : x
  2. Step 2: Convert to fraction form
    3,413.80/5,113.02 = 3,139.24/x
  3. Step 3: Cross multiply
    3,413.80x = 5,113.02 × 3,139.24
  4. Step 4: Simplify right side
    3,413.80x = 16,050,996.90
  5. Step 5: Solve for x
    x = 16,050,996.90/3,413.80
  6. Step 6: Final answer
    x = 4,701.80

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1.5x scale

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.