Home / 3,125.60-4,312.91-1,781.38

Finding the Fourth Proportional to 3,125.60, 4,312.91 and 1,781.38

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Solution

The fourth proportional to 3,125.60, 4,312.91 and 1,781.38 is: 2,458.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.60 : 4,312.91 = 1,781.38 : x
  2. Step 2: Convert to fraction form
    3,125.60/4,312.91 = 1,781.38/x
  3. Step 3: Cross multiply
    3,125.60x = 4,312.91 × 1,781.38
  4. Step 4: Simplify right side
    3,125.60x = 7,682,941.46
  5. Step 5: Solve for x
    x = 7,682,941.46/3,125.60
  6. Step 6: Final answer
    x = 2,458.07

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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.