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Finding the Fourth Proportional to 391,058.44, 539,660.66 and 212,210.44

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Solution

The fourth proportional to 391,058.44, 539,660.66 and 212,210.44 is: 292,850.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,058.44 : 539,660.66 = 212,210.44 : x
  2. Step 2: Convert to fraction form
    391,058.44/539,660.66 = 212,210.44/x
  3. Step 3: Cross multiply
    391,058.44x = 539,660.66 × 212,210.44
  4. Step 4: Simplify right side
    391,058.44x = 114,521,626,109.29
  5. Step 5: Solve for x
    x = 114,521,626,109.29/391,058.44
  6. Step 6: Final answer
    x = 292,850.41

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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.