Home / 1,791.18-2,471.85-1,005.21

Finding the Fourth Proportional to 1,791.18, 2,471.85 and 1,005.21

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Solution

The fourth proportional to 1,791.18, 2,471.85 and 1,005.21 is: 1,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.18 : 2,471.85 = 1,005.21 : x
  2. Step 2: Convert to fraction form
    1,791.18/2,471.85 = 1,005.21/x
  3. Step 3: Cross multiply
    1,791.18x = 2,471.85 × 1,005.21
  4. Step 4: Simplify right side
    1,791.18x = 2,484,728.34
  5. Step 5: Solve for x
    x = 2,484,728.34/1,791.18
  6. Step 6: Final answer
    x = 1,387.20

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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.