Home / 2,478.52-3,420.16-1,818.15

Finding the Fourth Proportional to 2,478.52, 3,420.16 and 1,818.15

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Solution

The fourth proportional to 2,478.52, 3,420.16 and 1,818.15 is: 2,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.52 : 3,420.16 = 1,818.15 : x
  2. Step 2: Convert to fraction form
    2,478.52/3,420.16 = 1,818.15/x
  3. Step 3: Cross multiply
    2,478.52x = 3,420.16 × 1,818.15
  4. Step 4: Simplify right side
    2,478.52x = 6,218,363.90
  5. Step 5: Solve for x
    x = 6,218,363.90/2,478.52
  6. Step 6: Final answer
    x = 2,508.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.