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Finding the Fourth Proportional to 398,747.42, 550,269.80 and 217,458.90

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Solution

The fourth proportional to 398,747.42, 550,269.80 and 217,458.90 is: 300,092.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,747.42 : 550,269.80 = 217,458.90 : x
  2. Step 2: Convert to fraction form
    398,747.42/550,269.80 = 217,458.90/x
  3. Step 3: Cross multiply
    398,747.42x = 550,269.80 × 217,458.90
  4. Step 4: Simplify right side
    398,747.42x = 119,661,065,411.22
  5. Step 5: Solve for x
    x = 119,661,065,411.22/398,747.42
  6. Step 6: Final answer
    x = 300,092.39

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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.