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Finding the Fourth Proportional to 303,785.61, 455,672.73 and 90,698.19

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Solution

The fourth proportional to 303,785.61, 455,672.73 and 90,698.19 is: 136,045.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,785.61 : 455,672.73 = 90,698.19 : x
  2. Step 2: Convert to fraction form
    303,785.61/455,672.73 = 90,698.19/x
  3. Step 3: Cross multiply
    303,785.61x = 455,672.73 × 90,698.19
  4. Step 4: Simplify right side
    303,785.61x = 41,328,691,843.36
  5. Step 5: Solve for x
    x = 41,328,691,843.36/303,785.61
  6. Step 6: Final answer
    x = 136,045.59

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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.