Home / 1,191.72-1,641.20-1,166.28

Finding the Fourth Proportional to 1,191.72, 1,641.20 and 1,166.28

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Solution

The fourth proportional to 1,191.72, 1,641.20 and 1,166.28 is: 1,606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.72 : 1,641.20 = 1,166.28 : x
  2. Step 2: Convert to fraction form
    1,191.72/1,641.20 = 1,166.28/x
  3. Step 3: Cross multiply
    1,191.72x = 1,641.20 × 1,166.28
  4. Step 4: Simplify right side
    1,191.72x = 1,914,098.74
  5. Step 5: Solve for x
    x = 1,914,098.74/1,191.72
  6. Step 6: Final answer
    x = 1,606.16

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1.5x scale

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.