Home / 2,810.60-4,215.73-862.80

Finding the Fourth Proportional to 2,810.60, 4,215.73 and 862.80

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Solution

The fourth proportional to 2,810.60, 4,215.73 and 862.80 is: 1,294.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.60 : 4,215.73 = 862.80 : x
  2. Step 2: Convert to fraction form
    2,810.60/4,215.73 = 862.80/x
  3. Step 3: Cross multiply
    2,810.60x = 4,215.73 × 862.80
  4. Step 4: Simplify right side
    2,810.60x = 3,637,331.84
  5. Step 5: Solve for x
    x = 3,637,331.84/2,810.60
  6. Step 6: Final answer
    x = 1,294.15

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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.