Home / 2,312.29-3,192.20-1,557.15

Finding the Fourth Proportional to 2,312.29, 3,192.20 and 1,557.15

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Solution

The fourth proportional to 2,312.29, 3,192.20 and 1,557.15 is: 2,149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.29 : 3,192.20 = 1,557.15 : x
  2. Step 2: Convert to fraction form
    2,312.29/3,192.20 = 1,557.15/x
  3. Step 3: Cross multiply
    2,312.29x = 3,192.20 × 1,557.15
  4. Step 4: Simplify right side
    2,312.29x = 4,970,742.31
  5. Step 5: Solve for x
    x = 4,970,742.31/2,312.29
  6. Step 6: Final answer
    x = 2,149.70

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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.