Home / 2,781.46-4,188.65-2,420.61

Finding the Fourth Proportional to 2,781.46, 4,188.65 and 2,420.61

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Solution

The fourth proportional to 2,781.46, 4,188.65 and 2,420.61 is: 3,645.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.46 : 4,188.65 = 2,420.61 : x
  2. Step 2: Convert to fraction form
    2,781.46/4,188.65 = 2,420.61/x
  3. Step 3: Cross multiply
    2,781.46x = 4,188.65 × 2,420.61
  4. Step 4: Simplify right side
    2,781.46x = 10,139,088.08
  5. Step 5: Solve for x
    x = 10,139,088.08/2,781.46
  6. Step 6: Final answer
    x = 3,645.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.