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Finding the Fourth Proportional to 391,058.82, 539,661.17 and 212,210.82

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Solution

The fourth proportional to 391,058.82, 539,661.17 and 212,210.82 is: 292,850.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,058.82 : 539,661.17 = 212,210.82 : x
  2. Step 2: Convert to fraction form
    391,058.82/539,661.17 = 212,210.82/x
  3. Step 3: Cross multiply
    391,058.82x = 539,661.17 × 212,210.82
  4. Step 4: Simplify right side
    391,058.82x = 114,521,938,346.81
  5. Step 5: Solve for x
    x = 114,521,938,346.81/391,058.82
  6. Step 6: Final answer
    x = 292,850.93

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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.