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Finding the Fourth Proportional to 328,296.65, 492,103.55 and 138,598.70

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Solution

The fourth proportional to 328,296.65, 492,103.55 and 138,598.70 is: 207,753.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,296.65 : 492,103.55 = 138,598.70 : x
  2. Step 2: Convert to fraction form
    328,296.65/492,103.55 = 138,598.70/x
  3. Step 3: Cross multiply
    328,296.65x = 492,103.55 × 138,598.70
  4. Step 4: Simplify right side
    328,296.65x = 68,204,910,181.36
  5. Step 5: Solve for x
    x = 68,204,910,181.36/328,296.65
  6. Step 6: Final answer
    x = 207,753.91

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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.