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Finding the Fourth Proportional to 288,616.97, 398,417.87 and 220,636.78

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Solution

The fourth proportional to 288,616.97, 398,417.87 and 220,636.78 is: 304,575.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,616.97 : 398,417.87 = 220,636.78 : x
  2. Step 2: Convert to fraction form
    288,616.97/398,417.87 = 220,636.78/x
  3. Step 3: Cross multiply
    288,616.97x = 398,417.87 × 220,636.78
  4. Step 4: Simplify right side
    288,616.97x = 87,905,635,486.81
  5. Step 5: Solve for x
    x = 87,905,635,486.81/288,616.97
  6. Step 6: Final answer
    x = 304,575.42

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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.