Home / 1,005.12-1,393.92-941.76

Finding the Fourth Proportional to 1,005.12, 1,393.92 and 941.76

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Solution

The fourth proportional to 1,005.12, 1,393.92 and 941.76 is: 1,306.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.12 : 1,393.92 = 941.76 : x
  2. Step 2: Convert to fraction form
    1,005.12/1,393.92 = 941.76/x
  3. Step 3: Cross multiply
    1,005.12x = 1,393.92 × 941.76
  4. Step 4: Simplify right side
    1,005.12x = 1,312,738.10
  5. Step 5: Solve for x
    x = 1,312,738.10/1,005.12
  6. Step 6: Final answer
    x = 1,306.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.