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Finding the Fourth Proportional to 272,404.20, 408,606.30 and 188,423.40

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Solution

The fourth proportional to 272,404.20, 408,606.30 and 188,423.40 is: 282,635.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,404.20 : 408,606.30 = 188,423.40 : x
  2. Step 2: Convert to fraction form
    272,404.20/408,606.30 = 188,423.40/x
  3. Step 3: Cross multiply
    272,404.20x = 408,606.30 × 188,423.40
  4. Step 4: Simplify right side
    272,404.20x = 76,990,988,307.42
  5. Step 5: Solve for x
    x = 76,990,988,307.42/272,404.20
  6. Step 6: Final answer
    x = 282,635.10

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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.