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Finding the Fourth Proportional to 303,398.51, 455,188.31 and 90,173.52

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Solution

The fourth proportional to 303,398.51, 455,188.31 and 90,173.52 is: 135,287.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,398.51 : 455,188.31 = 90,173.52 : x
  2. Step 2: Convert to fraction form
    303,398.51/455,188.31 = 90,173.52/x
  3. Step 3: Cross multiply
    303,398.51x = 455,188.31 × 90,173.52
  4. Step 4: Simplify right side
    303,398.51x = 41,045,932,062.83
  5. Step 5: Solve for x
    x = 41,045,932,062.83/303,398.51
  6. Step 6: Final answer
    x = 135,287.19

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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.