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Finding the Fourth Proportional to 398,388.48, 549,774.72 and 219,540.48

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Solution

The fourth proportional to 398,388.48, 549,774.72 and 219,540.48 is: 302,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,388.48 : 549,774.72 = 219,540.48 : x
  2. Step 2: Convert to fraction form
    398,388.48/549,774.72 = 219,540.48/x
  3. Step 3: Cross multiply
    398,388.48x = 549,774.72 × 219,540.48
  4. Step 4: Simplify right side
    398,388.48x = 120,697,805,920.67
  5. Step 5: Solve for x
    x = 120,697,805,920.67/398,388.48
  6. Step 6: Final answer
    x = 302,965.10

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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.