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Finding the Fourth Proportional to 616.26, 851.16 and 485.10

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Solution

The fourth proportional to 616.26, 851.16 and 485.10 is: 670.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.26 : 851.16 = 485.10 : x
  2. Step 2: Convert to fraction form
    616.26/851.16 = 485.10/x
  3. Step 3: Cross multiply
    616.26x = 851.16 × 485.10
  4. Step 4: Simplify right side
    616.26x = 412,897.72
  5. Step 5: Solve for x
    x = 412,897.72/616.26
  6. Step 6: Final answer
    x = 670.01

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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.