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Finding the Fourth Proportional to 442,886.20, 664,329.30 and 218,289.40

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Solution

The fourth proportional to 442,886.20, 664,329.30 and 218,289.40 is: 327,434.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,886.20 : 664,329.30 = 218,289.40 : x
  2. Step 2: Convert to fraction form
    442,886.20/664,329.30 = 218,289.40/x
  3. Step 3: Cross multiply
    442,886.20x = 664,329.30 × 218,289.40
  4. Step 4: Simplify right side
    442,886.20x = 145,016,044,299.42
  5. Step 5: Solve for x
    x = 145,016,044,299.42/442,886.20
  6. Step 6: Final answer
    x = 327,434.10

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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.