Home / 1,487.17-2,230.80-1,243.90

Finding the Fourth Proportional to 1,487.17, 2,230.80 and 1,243.90

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Solution

The fourth proportional to 1,487.17, 2,230.80 and 1,243.90 is: 1,865.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.17 : 2,230.80 = 1,243.90 : x
  2. Step 2: Convert to fraction form
    1,487.17/2,230.80 = 1,243.90/x
  3. Step 3: Cross multiply
    1,487.17x = 2,230.80 × 1,243.90
  4. Step 4: Simplify right side
    1,487.17x = 2,774,892.12
  5. Step 5: Solve for x
    x = 2,774,892.12/1,487.17
  6. Step 6: Final answer
    x = 1,865.89

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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.