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Finding the Fourth Proportional to 438,419.80, 657,629.70 and 225,843.40

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Solution

The fourth proportional to 438,419.80, 657,629.70 and 225,843.40 is: 338,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,419.80 : 657,629.70 = 225,843.40 : x
  2. Step 2: Convert to fraction form
    438,419.80/657,629.70 = 225,843.40/x
  3. Step 3: Cross multiply
    438,419.80x = 657,629.70 × 225,843.40
  4. Step 4: Simplify right side
    438,419.80x = 148,521,327,388.98
  5. Step 5: Solve for x
    x = 148,521,327,388.98/438,419.80
  6. Step 6: Final answer
    x = 338,765.10

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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.