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Finding the Fourth Proportional to 287,379.36, 396,446.16 and 223,278.48

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Solution

The fourth proportional to 287,379.36, 396,446.16 and 223,278.48 is: 308,017.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,379.36 : 396,446.16 = 223,278.48 : x
  2. Step 2: Convert to fraction form
    287,379.36/396,446.16 = 223,278.48/x
  3. Step 3: Cross multiply
    287,379.36x = 396,446.16 × 223,278.48
  4. Step 4: Simplify right side
    287,379.36x = 88,517,896,006.64
  5. Step 5: Solve for x
    x = 88,517,896,006.64/287,379.36
  6. Step 6: Final answer
    x = 308,017.58

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1.5x scale

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.