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Finding the Fourth Proportional to 551,330, 760,778.69 and 309,610.61

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Solution

The fourth proportional to 551,330, 760,778.69 and 309,610.61 is: 427,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,330 : 760,778.69 = 309,610.61 : x
  2. Step 2: Convert to fraction form
    551,330/760,778.69 = 309,610.61/x
  3. Step 3: Cross multiply
    551,330x = 760,778.69 × 309,610.61
  4. Step 4: Simplify right side
    551,330x = 235,545,154,285.90
  5. Step 5: Solve for x
    x = 235,545,154,285.90/551,330
  6. Step 6: Final answer
    x = 427,230.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.