Home / 1,177.11-1,620.71-999.72

Finding the Fourth Proportional to 1,177.11, 1,620.71 and 999.72

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Solution

The fourth proportional to 1,177.11, 1,620.71 and 999.72 is: 1,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.11 : 1,620.71 = 999.72 : x
  2. Step 2: Convert to fraction form
    1,177.11/1,620.71 = 999.72/x
  3. Step 3: Cross multiply
    1,177.11x = 1,620.71 × 999.72
  4. Step 4: Simplify right side
    1,177.11x = 1,620,256.20
  5. Step 5: Solve for x
    x = 1,620,256.20/1,177.11
  6. Step 6: Final answer
    x = 1,376.47

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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.