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Finding the Fourth Proportional to 691,874.56, 954,788.16 and 390,067.84

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Solution

The fourth proportional to 691,874.56, 954,788.16 and 390,067.84 is: 538,294.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,874.56 : 954,788.16 = 390,067.84 : x
  2. Step 2: Convert to fraction form
    691,874.56/954,788.16 = 390,067.84/x
  3. Step 3: Cross multiply
    691,874.56x = 954,788.16 × 390,067.84
  4. Step 4: Simplify right side
    691,874.56x = 372,432,155,228.77
  5. Step 5: Solve for x
    x = 372,432,155,228.77/691,874.56
  6. Step 6: Final answer
    x = 538,294.33

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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.