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Finding the Fourth Proportional to 717,540.31, 990,212.97 and 395,258.50

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Solution

The fourth proportional to 717,540.31, 990,212.97 and 395,258.50 is: 545,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,540.31 : 990,212.97 = 395,258.50 : x
  2. Step 2: Convert to fraction form
    717,540.31/990,212.97 = 395,258.50/x
  3. Step 3: Cross multiply
    717,540.31x = 990,212.97 × 395,258.50
  4. Step 4: Simplify right side
    717,540.31x = 391,390,093,202.75
  5. Step 5: Solve for x
    x = 391,390,093,202.75/717,540.31
  6. Step 6: Final answer
    x = 545,460.77

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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.