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Finding the Fourth Proportional to 398,745.42, 550,267.04 and 217,456.90

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Solution

The fourth proportional to 398,745.42, 550,267.04 and 217,456.90 is: 300,089.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,745.42 : 550,267.04 = 217,456.90 : x
  2. Step 2: Convert to fraction form
    398,745.42/550,267.04 = 217,456.90/x
  3. Step 3: Cross multiply
    398,745.42x = 550,267.04 × 217,456.90
  4. Step 4: Simplify right side
    398,745.42x = 119,659,364,690.58
  5. Step 5: Solve for x
    x = 119,659,364,690.58/398,745.42
  6. Step 6: Final answer
    x = 300,089.63

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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.