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Finding the Fourth Proportional to 288,612.40, 398,283.96 and 161,287.96

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Solution

The fourth proportional to 288,612.40, 398,283.96 and 161,287.96 is: 222,576.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,612.40 : 398,283.96 = 161,287.96 : x
  2. Step 2: Convert to fraction form
    288,612.40/398,283.96 = 161,287.96/x
  3. Step 3: Cross multiply
    288,612.40x = 398,283.96 × 161,287.96
  4. Step 4: Simplify right side
    288,612.40x = 64,238,407,409.12
  5. Step 5: Solve for x
    x = 64,238,407,409.12/288,612.40
  6. Step 6: Final answer
    x = 222,576.74

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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.