Home / 2,720.15-4,079.67-870.76

Finding the Fourth Proportional to 2,720.15, 4,079.67 and 870.76

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Solution

The fourth proportional to 2,720.15, 4,079.67 and 870.76 is: 1,305.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.15 : 4,079.67 = 870.76 : x
  2. Step 2: Convert to fraction form
    2,720.15/4,079.67 = 870.76/x
  3. Step 3: Cross multiply
    2,720.15x = 4,079.67 × 870.76
  4. Step 4: Simplify right side
    2,720.15x = 3,552,413.45
  5. Step 5: Solve for x
    x = 3,552,413.45/2,720.15
  6. Step 6: Final answer
    x = 1,305.96

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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.