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Finding the Fourth Proportional to 303,686.80, 455,904.60 and 191,366.80

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Solution

The fourth proportional to 303,686.80, 455,904.60 and 191,366.80 is: 287,286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,686.80 : 455,904.60 = 191,366.80 : x
  2. Step 2: Convert to fraction form
    303,686.80/455,904.60 = 191,366.80/x
  3. Step 3: Cross multiply
    303,686.80x = 455,904.60 × 191,366.80
  4. Step 4: Simplify right side
    303,686.80x = 87,245,004,407.28
  5. Step 5: Solve for x
    x = 87,245,004,407.28/303,686.80
  6. Step 6: Final answer
    x = 287,286.13

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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.