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Finding the Fourth Proportional to 684.10, 944.32 and 611.20

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Solution

The fourth proportional to 684.10, 944.32 and 611.20 is: 843.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.10 : 944.32 = 611.20 : x
  2. Step 2: Convert to fraction form
    684.10/944.32 = 611.20/x
  3. Step 3: Cross multiply
    684.10x = 944.32 × 611.20
  4. Step 4: Simplify right side
    684.10x = 577,164.50
  5. Step 5: Solve for x
    x = 577,164.50/684.10
  6. Step 6: Final answer
    x = 843.69

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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.