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Finding the Fourth Proportional to 288,555.78, 398,205.86 and 161,231.34

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Solution

The fourth proportional to 288,555.78, 398,205.86 and 161,231.34 is: 222,498.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,555.78 : 398,205.86 = 161,231.34 : x
  2. Step 2: Convert to fraction form
    288,555.78/398,205.86 = 161,231.34/x
  3. Step 3: Cross multiply
    288,555.78x = 398,205.86 × 161,231.34
  4. Step 4: Simplify right side
    288,555.78x = 64,203,264,403.65
  5. Step 5: Solve for x
    x = 64,203,264,403.65/288,555.78
  6. Step 6: Final answer
    x = 222,498.63

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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.