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Finding the Fourth Proportional to 772.74, 1,067.58 and 718.07

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Solution

The fourth proportional to 772.74, 1,067.58 and 718.07 is: 992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.74 : 1,067.58 = 718.07 : x
  2. Step 2: Convert to fraction form
    772.74/1,067.58 = 718.07/x
  3. Step 3: Cross multiply
    772.74x = 1,067.58 × 718.07
  4. Step 4: Simplify right side
    772.74x = 766,591.83
  5. Step 5: Solve for x
    x = 766,591.83/772.74
  6. Step 6: Final answer
    x = 992.04

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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.