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Finding the Fourth Proportional to 398,221.59, 549,545.55 and 219,373.59

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Solution

The fourth proportional to 398,221.59, 549,545.55 and 219,373.59 is: 302,735.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,221.59 : 549,545.55 = 219,373.59 : x
  2. Step 2: Convert to fraction form
    398,221.59/549,545.55 = 219,373.59/x
  3. Step 3: Cross multiply
    398,221.59x = 549,545.55 × 219,373.59
  4. Step 4: Simplify right side
    398,221.59x = 120,555,778,523.94
  5. Step 5: Solve for x
    x = 120,555,778,523.94/398,221.59
  6. Step 6: Final answer
    x = 302,735.42

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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.