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Finding the Fourth Proportional to 911,919.78, 1,367,879.70 and 247,071.78

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Solution

The fourth proportional to 911,919.78, 1,367,879.70 and 247,071.78 is: 370,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,919.78 : 1,367,879.70 = 247,071.78 : x
  2. Step 2: Convert to fraction form
    911,919.78/1,367,879.70 = 247,071.78/x
  3. Step 3: Cross multiply
    911,919.78x = 1,367,879.70 × 247,071.78
  4. Step 4: Simplify right side
    911,919.78x = 337,964,472,304.87
  5. Step 5: Solve for x
    x = 337,964,472,304.87/911,919.78
  6. Step 6: Final answer
    x = 370,607.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.