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Finding the Fourth Proportional to 303,340.13, 455,010.21 and 81,724.13

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Solution

The fourth proportional to 303,340.13, 455,010.21 and 81,724.13 is: 122,586.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,340.13 : 455,010.21 = 81,724.13 : x
  2. Step 2: Convert to fraction form
    303,340.13/455,010.21 = 81,724.13/x
  3. Step 3: Cross multiply
    303,340.13x = 455,010.21 × 81,724.13
  4. Step 4: Simplify right side
    303,340.13x = 37,185,311,278.32
  5. Step 5: Solve for x
    x = 37,185,311,278.32/303,340.13
  6. Step 6: Final answer
    x = 122,586.19

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Similar ratio
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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.