Home / 820,276.60-1,230,414.90-259,311.10

Finding the Fourth Proportional to 820,276.60, 1,230,414.90 and 259,311.10

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Solution

The fourth proportional to 820,276.60, 1,230,414.90 and 259,311.10 is: 388,966.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,276.60 : 1,230,414.90 = 259,311.10 : x
  2. Step 2: Convert to fraction form
    820,276.60/1,230,414.90 = 259,311.10/x
  3. Step 3: Cross multiply
    820,276.60x = 1,230,414.90 × 259,311.10
  4. Step 4: Simplify right side
    820,276.60x = 319,060,241,175.39
  5. Step 5: Solve for x
    x = 319,060,241,175.39/820,276.60
  6. Step 6: Final answer
    x = 388,966.65

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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.