Home / 1,262.74-1,741.59-820.79

Finding the Fourth Proportional to 1,262.74, 1,741.59 and 820.79

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Solution

The fourth proportional to 1,262.74, 1,741.59 and 820.79 is: 1,132.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.74 : 1,741.59 = 820.79 : x
  2. Step 2: Convert to fraction form
    1,262.74/1,741.59 = 820.79/x
  3. Step 3: Cross multiply
    1,262.74x = 1,741.59 × 820.79
  4. Step 4: Simplify right side
    1,262.74x = 1,429,470.95
  5. Step 5: Solve for x
    x = 1,429,470.95/1,262.74
  6. Step 6: Final answer
    x = 1,132.04

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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.