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Finding the Fourth Proportional to 303,410.40, 455,374.80 and 135,189.60

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Solution

The fourth proportional to 303,410.40, 455,374.80 and 135,189.60 is: 202,899.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,410.40 : 455,374.80 = 135,189.60 : x
  2. Step 2: Convert to fraction form
    303,410.40/455,374.80 = 135,189.60/x
  3. Step 3: Cross multiply
    303,410.40x = 455,374.80 × 135,189.60
  4. Step 4: Simplify right side
    303,410.40x = 61,561,937,062.08
  5. Step 5: Solve for x
    x = 61,561,937,062.08/303,410.40
  6. Step 6: Final answer
    x = 202,899.89

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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.