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Finding the Fourth Proportional to 328,511.80, 492,767.70 and 262,081.68

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Solution

The fourth proportional to 328,511.80, 492,767.70 and 262,081.68 is: 393,122.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,511.80 : 492,767.70 = 262,081.68 : x
  2. Step 2: Convert to fraction form
    328,511.80/492,767.70 = 262,081.68/x
  3. Step 3: Cross multiply
    328,511.80x = 492,767.70 × 262,081.68
  4. Step 4: Simplify right side
    328,511.80x = 129,145,386,665.74
  5. Step 5: Solve for x
    x = 129,145,386,665.74/328,511.80
  6. Step 6: Final answer
    x = 393,122.52

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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.