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Finding the Fourth Proportional to 681,691.82, 940,388.54 and 520,266.51

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Solution

The fourth proportional to 681,691.82, 940,388.54 and 520,266.51 is: 717,703.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,691.82 : 940,388.54 = 520,266.51 : x
  2. Step 2: Convert to fraction form
    681,691.82/940,388.54 = 520,266.51/x
  3. Step 3: Cross multiply
    681,691.82x = 940,388.54 × 520,266.51
  4. Step 4: Simplify right side
    681,691.82x = 489,252,661,148.46
  5. Step 5: Solve for x
    x = 489,252,661,148.46/681,691.82
  6. Step 6: Final answer
    x = 717,703.59

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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.