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Finding the Fourth Proportional to 772.68, 1,152.57 and 699.72

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Solution

The fourth proportional to 772.68, 1,152.57 and 699.72 is: 1,043.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.68 : 1,152.57 = 699.72 : x
  2. Step 2: Convert to fraction form
    772.68/1,152.57 = 699.72/x
  3. Step 3: Cross multiply
    772.68x = 1,152.57 × 699.72
  4. Step 4: Simplify right side
    772.68x = 806,476.28
  5. Step 5: Solve for x
    x = 806,476.28/772.68
  6. Step 6: Final answer
    x = 1,043.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.