Home / 2,161.80-3,243.15-929.52

Finding the Fourth Proportional to 2,161.80, 3,243.15 and 929.52

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Solution

The fourth proportional to 2,161.80, 3,243.15 and 929.52 is: 1,394.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.80 : 3,243.15 = 929.52 : x
  2. Step 2: Convert to fraction form
    2,161.80/3,243.15 = 929.52/x
  3. Step 3: Cross multiply
    2,161.80x = 3,243.15 × 929.52
  4. Step 4: Simplify right side
    2,161.80x = 3,014,572.79
  5. Step 5: Solve for x
    x = 3,014,572.79/2,161.80
  6. Step 6: Final answer
    x = 1,394.47

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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.