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Finding the Fourth Proportional to 398,805.32, 550,357.32 and 217,516.59

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Solution

The fourth proportional to 398,805.32, 550,357.32 and 217,516.59 is: 300,176.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,805.32 : 550,357.32 = 217,516.59 : x
  2. Step 2: Convert to fraction form
    398,805.32/550,357.32 = 217,516.59/x
  3. Step 3: Cross multiply
    398,805.32x = 550,357.32 × 217,516.59
  4. Step 4: Simplify right side
    398,805.32x = 119,711,847,527.94
  5. Step 5: Solve for x
    x = 119,711,847,527.94/398,805.32
  6. Step 6: Final answer
    x = 300,176.16

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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.