Home / 1,881.24-2,820.18-1,187.40

Finding the Fourth Proportional to 1,881.24, 2,820.18 and 1,187.40

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Solution

The fourth proportional to 1,881.24, 2,820.18 and 1,187.40 is: 1,780.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.24 : 2,820.18 = 1,187.40 : x
  2. Step 2: Convert to fraction form
    1,881.24/2,820.18 = 1,187.40/x
  3. Step 3: Cross multiply
    1,881.24x = 2,820.18 × 1,187.40
  4. Step 4: Simplify right side
    1,881.24x = 3,348,681.73
  5. Step 5: Solve for x
    x = 3,348,681.73/1,881.24
  6. Step 6: Final answer
    x = 1,780.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.