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Finding the Fourth Proportional to 288,218.38, 396,860.90 and 261,185.03

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Solution

The fourth proportional to 288,218.38, 396,860.90 and 261,185.03 is: 359,637.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,218.38 : 396,860.90 = 261,185.03 : x
  2. Step 2: Convert to fraction form
    288,218.38/396,860.90 = 261,185.03/x
  3. Step 3: Cross multiply
    288,218.38x = 396,860.90 × 261,185.03
  4. Step 4: Simplify right side
    288,218.38x = 103,654,125,758.55
  5. Step 5: Solve for x
    x = 103,654,125,758.55/288,218.38
  6. Step 6: Final answer
    x = 359,637.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.