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Finding the Fourth Proportional to 303,630.90, 455,366.70 and 90,341.43

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Solution

The fourth proportional to 303,630.90, 455,366.70 and 90,341.43 is: 135,488.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,630.90 : 455,366.70 = 90,341.43 : x
  2. Step 2: Convert to fraction form
    303,630.90/455,366.70 = 90,341.43/x
  3. Step 3: Cross multiply
    303,630.90x = 455,366.70 × 90,341.43
  4. Step 4: Simplify right side
    303,630.90x = 41,138,478,852.38
  5. Step 5: Solve for x
    x = 41,138,478,852.38/303,630.90
  6. Step 6: Final answer
    x = 135,488.45

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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.