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Finding the Fourth Proportional to 662,478.28, 993,717.72 and 213,199.09

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Solution

The fourth proportional to 662,478.28, 993,717.72 and 213,199.09 is: 319,798.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,478.28 : 993,717.72 = 213,199.09 : x
  2. Step 2: Convert to fraction form
    662,478.28/993,717.72 = 213,199.09/x
  3. Step 3: Cross multiply
    662,478.28x = 993,717.72 × 213,199.09
  4. Step 4: Simplify right side
    662,478.28x = 211,859,711,136.58
  5. Step 5: Solve for x
    x = 211,859,711,136.58/662,478.28
  6. Step 6: Final answer
    x = 319,798.73

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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.