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Finding the Fourth Proportional to 616.41, 851.19 and 485.19

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Solution

The fourth proportional to 616.41, 851.19 and 485.19 is: 669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.41 : 851.19 = 485.19 : x
  2. Step 2: Convert to fraction form
    616.41/851.19 = 485.19/x
  3. Step 3: Cross multiply
    616.41x = 851.19 × 485.19
  4. Step 4: Simplify right side
    616.41x = 412,988.88
  5. Step 5: Solve for x
    x = 412,988.88/616.41
  6. Step 6: Final answer
    x = 669.99

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Double scale
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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.