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Finding the Fourth Proportional to 303,553.40, 455,250.71 and 90,263.90

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Solution

The fourth proportional to 303,553.40, 455,250.71 and 90,263.90 is: 135,372.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,553.40 : 455,250.71 = 90,263.90 : x
  2. Step 2: Convert to fraction form
    303,553.40/455,250.71 = 90,263.90/x
  3. Step 3: Cross multiply
    303,553.40x = 455,250.71 × 90,263.90
  4. Step 4: Simplify right side
    303,553.40x = 41,092,705,926.16
  5. Step 5: Solve for x
    x = 41,092,705,926.16/303,553.40
  6. Step 6: Final answer
    x = 135,372.25

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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.