Home / 1,371.75-1,892.34-929.79

Finding the Fourth Proportional to 1,371.75, 1,892.34 and 929.79

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Solution

The fourth proportional to 1,371.75, 1,892.34 and 929.79 is: 1,282.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.75 : 1,892.34 = 929.79 : x
  2. Step 2: Convert to fraction form
    1,371.75/1,892.34 = 929.79/x
  3. Step 3: Cross multiply
    1,371.75x = 1,892.34 × 929.79
  4. Step 4: Simplify right side
    1,371.75x = 1,759,478.81
  5. Step 5: Solve for x
    x = 1,759,478.81/1,371.75
  6. Step 6: Final answer
    x = 1,282.65

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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.