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Finding the Fourth Proportional to 895.35, 1,236.16 and 615.50

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Solution

The fourth proportional to 895.35, 1,236.16 and 615.50 is: 849.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.35 : 1,236.16 = 615.50 : x
  2. Step 2: Convert to fraction form
    895.35/1,236.16 = 615.50/x
  3. Step 3: Cross multiply
    895.35x = 1,236.16 × 615.50
  4. Step 4: Simplify right side
    895.35x = 760,855.70
  5. Step 5: Solve for x
    x = 760,855.70/895.35
  6. Step 6: Final answer
    x = 849.78

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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.