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Finding the Fourth Proportional to 398,454.75, 549,902.12 and 219,641.31

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Solution

The fourth proportional to 398,454.75, 549,902.12 and 219,641.31 is: 303,124.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,454.75 : 549,902.12 = 219,641.31 : x
  2. Step 2: Convert to fraction form
    398,454.75/549,902.12 = 219,641.31/x
  3. Step 3: Cross multiply
    398,454.75x = 549,902.12 × 219,641.31
  4. Step 4: Simplify right side
    398,454.75x = 120,781,220,910.37
  5. Step 5: Solve for x
    x = 120,781,220,910.37/398,454.75
  6. Step 6: Final answer
    x = 303,124.06

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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.