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Finding the Fourth Proportional to 920.06, 1,268.76 and 616.61

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Solution

The fourth proportional to 920.06, 1,268.76 and 616.61 is: 850.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.06 : 1,268.76 = 616.61 : x
  2. Step 2: Convert to fraction form
    920.06/1,268.76 = 616.61/x
  3. Step 3: Cross multiply
    920.06x = 1,268.76 × 616.61
  4. Step 4: Simplify right side
    920.06x = 782,335.59
  5. Step 5: Solve for x
    x = 782,335.59/920.06
  6. Step 6: Final answer
    x = 850.31

Related Problems

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Half scale
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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.