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Finding the Fourth Proportional to 398,394.82, 549,770.88 and 217,103.05

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Solution

The fourth proportional to 398,394.82, 549,770.88 and 217,103.05 is: 299,594.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,394.82 : 549,770.88 = 217,103.05 : x
  2. Step 2: Convert to fraction form
    398,394.82/549,770.88 = 217,103.05/x
  3. Step 3: Cross multiply
    398,394.82x = 549,770.88 × 217,103.05
  4. Step 4: Simplify right side
    398,394.82x = 119,356,933,474.76
  5. Step 5: Solve for x
    x = 119,356,933,474.76/398,394.82
  6. Step 6: Final answer
    x = 299,594.59

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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.