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Finding the Fourth Proportional to 303,381.20, 455,071.80 and 134,901.20

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Solution

The fourth proportional to 303,381.20, 455,071.80 and 134,901.20 is: 202,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,381.20 : 455,071.80 = 134,901.20 : x
  2. Step 2: Convert to fraction form
    303,381.20/455,071.80 = 134,901.20/x
  3. Step 3: Cross multiply
    303,381.20x = 455,071.80 × 134,901.20
  4. Step 4: Simplify right side
    303,381.20x = 61,389,731,906.16
  5. Step 5: Solve for x
    x = 61,389,731,906.16/303,381.20
  6. Step 6: Final answer
    x = 202,351.80

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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.