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Finding the Fourth Proportional to 762.96, 1,052.28 and 679.02

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Solution

The fourth proportional to 762.96, 1,052.28 and 679.02 is: 936.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.96 : 1,052.28 = 679.02 : x
  2. Step 2: Convert to fraction form
    762.96/1,052.28 = 679.02/x
  3. Step 3: Cross multiply
    762.96x = 1,052.28 × 679.02
  4. Step 4: Simplify right side
    762.96x = 714,519.17
  5. Step 5: Solve for x
    x = 714,519.17/762.96
  6. Step 6: Final answer
    x = 936.51

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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.