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Finding the Fourth Proportional to 303,638.40, 455,377.91 and 90,348.93

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Solution

The fourth proportional to 303,638.40, 455,377.91 and 90,348.93 is: 135,499.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,638.40 : 455,377.91 = 90,348.93 : x
  2. Step 2: Convert to fraction form
    303,638.40/455,377.91 = 90,348.93/x
  3. Step 3: Cross multiply
    303,638.40x = 455,377.91 × 90,348.93
  4. Step 4: Simplify right side
    303,638.40x = 41,142,906,462.39
  5. Step 5: Solve for x
    x = 41,142,906,462.39/303,638.40
  6. Step 6: Final answer
    x = 135,499.68

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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.