Home / 2,810.85-4,218.85-1,425.15

Finding the Fourth Proportional to 2,810.85, 4,218.85 and 1,425.15

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Solution

The fourth proportional to 2,810.85, 4,218.85 and 1,425.15 is: 2,139.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.85 : 4,218.85 = 1,425.15 : x
  2. Step 2: Convert to fraction form
    2,810.85/4,218.85 = 1,425.15/x
  3. Step 3: Cross multiply
    2,810.85x = 4,218.85 × 1,425.15
  4. Step 4: Simplify right side
    2,810.85x = 6,012,495.86
  5. Step 5: Solve for x
    x = 6,012,495.86/2,810.85
  6. Step 6: Final answer
    x = 2,139.03

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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.