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Finding the Fourth Proportional to 391,058.88, 539,661.25 and 212,210.88

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Solution

The fourth proportional to 391,058.88, 539,661.25 and 212,210.88 is: 292,851.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,058.88 : 539,661.25 = 212,210.88 : x
  2. Step 2: Convert to fraction form
    391,058.88/539,661.25 = 212,210.88/x
  3. Step 3: Cross multiply
    391,058.88x = 539,661.25 × 212,210.88
  4. Step 4: Simplify right side
    391,058.88x = 114,521,988,764.40
  5. Step 5: Solve for x
    x = 114,521,988,764.40/391,058.88
  6. Step 6: Final answer
    x = 292,851.01

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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.