Home / 2,177.90-3,005.80-1,381.62

Finding the Fourth Proportional to 2,177.90, 3,005.80 and 1,381.62

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Solution

The fourth proportional to 2,177.90, 3,005.80 and 1,381.62 is: 1,906.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.90 : 3,005.80 = 1,381.62 : x
  2. Step 2: Convert to fraction form
    2,177.90/3,005.80 = 1,381.62/x
  3. Step 3: Cross multiply
    2,177.90x = 3,005.80 × 1,381.62
  4. Step 4: Simplify right side
    2,177.90x = 4,152,881.21
  5. Step 5: Solve for x
    x = 4,152,881.21/2,177.90
  6. Step 6: Final answer
    x = 1,906.83

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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.