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Finding the Fourth Proportional to 288,603.78, 398,272.50 and 161,279.34

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Solution

The fourth proportional to 288,603.78, 398,272.50 and 161,279.34 is: 222,565.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,603.78 : 398,272.50 = 161,279.34 : x
  2. Step 2: Convert to fraction form
    288,603.78/398,272.50 = 161,279.34/x
  3. Step 3: Cross multiply
    288,603.78x = 398,272.50 × 161,279.34
  4. Step 4: Simplify right side
    288,603.78x = 64,233,125,940.15
  5. Step 5: Solve for x
    x = 64,233,125,940.15/288,603.78
  6. Step 6: Final answer
    x = 222,565.09

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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.