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Finding the Fourth Proportional to 398,221.90, 549,545.98 and 219,373.90

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Solution

The fourth proportional to 398,221.90, 549,545.98 and 219,373.90 is: 302,735.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,221.90 : 549,545.98 = 219,373.90 : x
  2. Step 2: Convert to fraction form
    398,221.90/549,545.98 = 219,373.90/x
  3. Step 3: Cross multiply
    398,221.90x = 549,545.98 × 219,373.90
  4. Step 4: Simplify right side
    398,221.90x = 120,556,044,861.92
  5. Step 5: Solve for x
    x = 120,556,044,861.92/398,221.90
  6. Step 6: Final answer
    x = 302,735.85

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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.