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Finding the Fourth Proportional to 681.46, 933.86 and 615.85

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Solution

The fourth proportional to 681.46, 933.86 and 615.85 is: 843.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.46 : 933.86 = 615.85 : x
  2. Step 2: Convert to fraction form
    681.46/933.86 = 615.85/x
  3. Step 3: Cross multiply
    681.46x = 933.86 × 615.85
  4. Step 4: Simplify right side
    681.46x = 575,109.93
  5. Step 5: Solve for x
    x = 575,109.93/681.46
  6. Step 6: Final answer
    x = 843.94

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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.