Home / 2,487.92-3,434.40-1,605.15

Finding the Fourth Proportional to 2,487.92, 3,434.40 and 1,605.15

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Solution

The fourth proportional to 2,487.92, 3,434.40 and 1,605.15 is: 2,215.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.92 : 3,434.40 = 1,605.15 : x
  2. Step 2: Convert to fraction form
    2,487.92/3,434.40 = 1,605.15/x
  3. Step 3: Cross multiply
    2,487.92x = 3,434.40 × 1,605.15
  4. Step 4: Simplify right side
    2,487.92x = 5,512,727.16
  5. Step 5: Solve for x
    x = 5,512,727.16/2,487.92
  6. Step 6: Final answer
    x = 2,215.80

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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.