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Finding the Fourth Proportional to 472,279.80, 708,419.70 and 191,998.20

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Solution

The fourth proportional to 472,279.80, 708,419.70 and 191,998.20 is: 287,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,279.80 : 708,419.70 = 191,998.20 : x
  2. Step 2: Convert to fraction form
    472,279.80/708,419.70 = 191,998.20/x
  3. Step 3: Cross multiply
    472,279.80x = 708,419.70 × 191,998.20
  4. Step 4: Simplify right side
    472,279.80x = 136,015,307,244.54
  5. Step 5: Solve for x
    x = 136,015,307,244.54/472,279.80
  6. Step 6: Final answer
    x = 287,997.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.