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Finding the Fourth Proportional to 303,429.90, 455,205.60 and 90,197.40

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Solution

The fourth proportional to 303,429.90, 455,205.60 and 90,197.40 is: 135,314.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,429.90 : 455,205.60 = 90,197.40 : x
  2. Step 2: Convert to fraction form
    303,429.90/455,205.60 = 90,197.40/x
  3. Step 3: Cross multiply
    303,429.90x = 455,205.60 × 90,197.40
  4. Step 4: Simplify right side
    303,429.90x = 41,058,361,585.44
  5. Step 5: Solve for x
    x = 41,058,361,585.44/303,429.90
  6. Step 6: Final answer
    x = 135,314.16

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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.