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Finding the Fourth Proportional to 648.89, 895.67 and 615.83

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Solution

The fourth proportional to 648.89, 895.67 and 615.83 is: 850.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.89 : 895.67 = 615.83 : x
  2. Step 2: Convert to fraction form
    648.89/895.67 = 615.83/x
  3. Step 3: Cross multiply
    648.89x = 895.67 × 615.83
  4. Step 4: Simplify right side
    648.89x = 551,572.90
  5. Step 5: Solve for x
    x = 551,572.90/648.89
  6. Step 6: Final answer
    x = 850.03

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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.