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Finding the Fourth Proportional to 367,813.40, 551,720.10 and 218,514.20

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Solution

The fourth proportional to 367,813.40, 551,720.10 and 218,514.20 is: 327,771.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,813.40 : 551,720.10 = 218,514.20 : x
  2. Step 2: Convert to fraction form
    367,813.40/551,720.10 = 218,514.20/x
  3. Step 3: Cross multiply
    367,813.40x = 551,720.10 × 218,514.20
  4. Step 4: Simplify right side
    367,813.40x = 120,558,676,275.42
  5. Step 5: Solve for x
    x = 120,558,676,275.42/367,813.40
  6. Step 6: Final answer
    x = 327,771.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.