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Finding the Fourth Proportional to 681.72, 933.24 and 679.44

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Solution

The fourth proportional to 681.72, 933.24 and 679.44 is: 930.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.72 : 933.24 = 679.44 : x
  2. Step 2: Convert to fraction form
    681.72/933.24 = 679.44/x
  3. Step 3: Cross multiply
    681.72x = 933.24 × 679.44
  4. Step 4: Simplify right side
    681.72x = 634,080.59
  5. Step 5: Solve for x
    x = 634,080.59/681.72
  6. Step 6: Final answer
    x = 930.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.