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Finding the Fourth Proportional to 438,353.40, 657,335.70 and 201,768.60

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Solution

The fourth proportional to 438,353.40, 657,335.70 and 201,768.60 is: 302,563.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,353.40 : 657,335.70 = 201,768.60 : x
  2. Step 2: Convert to fraction form
    438,353.40/657,335.70 = 201,768.60/x
  3. Step 3: Cross multiply
    438,353.40x = 657,335.70 × 201,768.60
  4. Step 4: Simplify right side
    438,353.40x = 132,629,703,919.02
  5. Step 5: Solve for x
    x = 132,629,703,919.02/438,353.40
  6. Step 6: Final answer
    x = 302,563.42

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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.