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Finding the Fourth Proportional to 303,655.20, 455,395.73 and 90,414.20

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Solution

The fourth proportional to 303,655.20, 455,395.73 and 90,414.20 is: 135,595.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,655.20 : 455,395.73 = 90,414.20 : x
  2. Step 2: Convert to fraction form
    303,655.20/455,395.73 = 90,414.20/x
  3. Step 3: Cross multiply
    303,655.20x = 455,395.73 × 90,414.20
  4. Step 4: Simplify right side
    303,655.20x = 41,174,237,882.32
  5. Step 5: Solve for x
    x = 41,174,237,882.32/303,655.20
  6. Step 6: Final answer
    x = 135,595.37

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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.