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Finding the Fourth Proportional to 371,257.75, 555,944.65 and 311,128.11

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Solution

The fourth proportional to 371,257.75, 555,944.65 and 311,128.11 is: 465,902.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,257.75 : 555,944.65 = 311,128.11 : x
  2. Step 2: Convert to fraction form
    371,257.75/555,944.65 = 311,128.11/x
  3. Step 3: Cross multiply
    371,257.75x = 555,944.65 × 311,128.11
  4. Step 4: Simplify right side
    371,257.75x = 172,970,008,219.11
  5. Step 5: Solve for x
    x = 172,970,008,219.11/371,257.75
  6. Step 6: Final answer
    x = 465,902.75

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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.