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Finding the Fourth Proportional to 910,477.80, 1,365,716.70 and 378,380.70

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Solution

The fourth proportional to 910,477.80, 1,365,716.70 and 378,380.70 is: 567,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,477.80 : 1,365,716.70 = 378,380.70 : x
  2. Step 2: Convert to fraction form
    910,477.80/1,365,716.70 = 378,380.70/x
  3. Step 3: Cross multiply
    910,477.80x = 1,365,716.70 × 378,380.70
  4. Step 4: Simplify right side
    910,477.80x = 516,760,840,947.69
  5. Step 5: Solve for x
    x = 516,760,840,947.69/910,477.80
  6. Step 6: Final answer
    x = 567,571.05

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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.