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Finding the Fourth Proportional to 303,422.80, 455,134.20 and 103,749.70

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Solution

The fourth proportional to 303,422.80, 455,134.20 and 103,749.70 is: 155,624.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,422.80 : 455,134.20 = 103,749.70 : x
  2. Step 2: Convert to fraction form
    303,422.80/455,134.20 = 103,749.70/x
  3. Step 3: Cross multiply
    303,422.80x = 455,134.20 × 103,749.70
  4. Step 4: Simplify right side
    303,422.80x = 47,220,036,709.74
  5. Step 5: Solve for x
    x = 47,220,036,709.74/303,422.80
  6. Step 6: Final answer
    x = 155,624.55

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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.