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Finding the Fourth Proportional to 616.65, 850.97 and 354.75

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Solution

The fourth proportional to 616.65, 850.97 and 354.75 is: 489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.65 : 850.97 = 354.75 : x
  2. Step 2: Convert to fraction form
    616.65/850.97 = 354.75/x
  3. Step 3: Cross multiply
    616.65x = 850.97 × 354.75
  4. Step 4: Simplify right side
    616.65x = 301,881.61
  5. Step 5: Solve for x
    x = 301,881.61/616.65
  6. Step 6: Final answer
    x = 489.55

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1.5x scale

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.