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Finding the Fourth Proportional to 616.11, 928.32 and 549.79

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Solution

The fourth proportional to 616.11, 928.32 and 549.79 is: 828.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.11 : 928.32 = 549.79 : x
  2. Step 2: Convert to fraction form
    616.11/928.32 = 549.79/x
  3. Step 3: Cross multiply
    616.11x = 928.32 × 549.79
  4. Step 4: Simplify right side
    616.11x = 510,381.05
  5. Step 5: Solve for x
    x = 510,381.05/616.11
  6. Step 6: Final answer
    x = 828.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.