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Finding the Fourth Proportional to 398,217.90, 549,540.46 and 219,369.90

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Solution

The fourth proportional to 398,217.90, 549,540.46 and 219,369.90 is: 302,730.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,217.90 : 549,540.46 = 219,369.90 : x
  2. Step 2: Convert to fraction form
    398,217.90/549,540.46 = 219,369.90/x
  3. Step 3: Cross multiply
    398,217.90x = 549,540.46 × 219,369.90
  4. Step 4: Simplify right side
    398,217.90x = 120,552,632,460.03
  5. Step 5: Solve for x
    x = 120,552,632,460.03/398,217.90
  6. Step 6: Final answer
    x = 302,730.32

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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.