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Finding the Fourth Proportional to 338,226.96, 465,690.90 and 287,133.78

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Solution

The fourth proportional to 338,226.96, 465,690.90 and 287,133.78 is: 395,342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,226.96 : 465,690.90 = 287,133.78 : x
  2. Step 2: Convert to fraction form
    338,226.96/465,690.90 = 287,133.78/x
  3. Step 3: Cross multiply
    338,226.96x = 465,690.90 × 287,133.78
  4. Step 4: Simplify right side
    338,226.96x = 133,715,588,428.60
  5. Step 5: Solve for x
    x = 133,715,588,428.60/338,226.96
  6. Step 6: Final answer
    x = 395,342.79

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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.