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Finding the Fourth Proportional to 400,865.88, 551,935.98 and 340,311

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Solution

The fourth proportional to 400,865.88, 551,935.98 and 340,311 is: 468,560.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,865.88 : 551,935.98 = 340,311 : x
  2. Step 2: Convert to fraction form
    400,865.88/551,935.98 = 340,311/x
  3. Step 3: Cross multiply
    400,865.88x = 551,935.98 × 340,311
  4. Step 4: Simplify right side
    400,865.88x = 187,829,885,289.78
  5. Step 5: Solve for x
    x = 187,829,885,289.78/400,865.88
  6. Step 6: Final answer
    x = 468,560.42

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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.