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Finding the Fourth Proportional to 894.60, 1,234.80 and 615.76

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Solution

The fourth proportional to 894.60, 1,234.80 and 615.76 is: 849.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.60 : 1,234.80 = 615.76 : x
  2. Step 2: Convert to fraction form
    894.60/1,234.80 = 615.76/x
  3. Step 3: Cross multiply
    894.60x = 1,234.80 × 615.76
  4. Step 4: Simplify right side
    894.60x = 760,340.45
  5. Step 5: Solve for x
    x = 760,340.45/894.60
  6. Step 6: Final answer
    x = 849.92

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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.