Home / 2,618.15-3,612.75-1,439.15

Finding the Fourth Proportional to 2,618.15, 3,612.75 and 1,439.15

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Solution

The fourth proportional to 2,618.15, 3,612.75 and 1,439.15 is: 1,985.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.15 : 3,612.75 = 1,439.15 : x
  2. Step 2: Convert to fraction form
    2,618.15/3,612.75 = 1,439.15/x
  3. Step 3: Cross multiply
    2,618.15x = 3,612.75 × 1,439.15
  4. Step 4: Simplify right side
    2,618.15x = 5,199,289.16
  5. Step 5: Solve for x
    x = 5,199,289.16/2,618.15
  6. Step 6: Final answer
    x = 1,985.86

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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.