Home / 2,812.95-4,220.10-865.17

Finding the Fourth Proportional to 2,812.95, 4,220.10 and 865.17

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Solution

The fourth proportional to 2,812.95, 4,220.10 and 865.17 is: 1,297.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.95 : 4,220.10 = 865.17 : x
  2. Step 2: Convert to fraction form
    2,812.95/4,220.10 = 865.17/x
  3. Step 3: Cross multiply
    2,812.95x = 4,220.10 × 865.17
  4. Step 4: Simplify right side
    2,812.95x = 3,651,103.92
  5. Step 5: Solve for x
    x = 3,651,103.92/2,812.95
  6. Step 6: Final answer
    x = 1,297.96

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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.