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Finding the Fourth Proportional to 207,918.20, 311,221.20 and 201,357.20

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Solution

The fourth proportional to 207,918.20, 311,221.20 and 201,357.20 is: 301,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,918.20 : 311,221.20 = 201,357.20 : x
  2. Step 2: Convert to fraction form
    207,918.20/311,221.20 = 201,357.20/x
  3. Step 3: Cross multiply
    207,918.20x = 311,221.20 × 201,357.20
  4. Step 4: Simplify right side
    207,918.20x = 62,666,629,412.64
  5. Step 5: Solve for x
    x = 62,666,629,412.64/207,918.20
  6. Step 6: Final answer
    x = 301,400.40

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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.