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Finding the Fourth Proportional to 303,636, 455,207.88 and 126,275.76

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Solution

The fourth proportional to 303,636, 455,207.88 and 126,275.76 is: 189,311.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,636 : 455,207.88 = 126,275.76 : x
  2. Step 2: Convert to fraction form
    303,636/455,207.88 = 126,275.76/x
  3. Step 3: Cross multiply
    303,636x = 455,207.88 × 126,275.76
  4. Step 4: Simplify right side
    303,636x = 57,481,721,004.99
  5. Step 5: Solve for x
    x = 57,481,721,004.99/303,636
  6. Step 6: Final answer
    x = 189,311.28

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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.