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Finding the Fourth Proportional to 911,906.85, 1,258,392.27 and 503,987.61

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Solution

The fourth proportional to 911,906.85, 1,258,392.27 and 503,987.61 is: 695,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,906.85 : 1,258,392.27 = 503,987.61 : x
  2. Step 2: Convert to fraction form
    911,906.85/1,258,392.27 = 503,987.61/x
  3. Step 3: Cross multiply
    911,906.85x = 1,258,392.27 × 503,987.61
  4. Step 4: Simplify right side
    911,906.85x = 634,214,112,599.78
  5. Step 5: Solve for x
    x = 634,214,112,599.78/911,906.85
  6. Step 6: Final answer
    x = 695,481.25

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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.