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Finding the Fourth Proportional to 517,998.80, 776,998.20 and 378,030.80

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Solution

The fourth proportional to 517,998.80, 776,998.20 and 378,030.80 is: 567,046.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,998.80 : 776,998.20 = 378,030.80 : x
  2. Step 2: Convert to fraction form
    517,998.80/776,998.20 = 378,030.80/x
  3. Step 3: Cross multiply
    517,998.80x = 776,998.20 × 378,030.80
  4. Step 4: Simplify right side
    517,998.80x = 293,729,251,144.56
  5. Step 5: Solve for x
    x = 293,729,251,144.56/517,998.80
  6. Step 6: Final answer
    x = 567,046.20

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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.