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Finding the Fourth Proportional to 303,431.40, 455,256.45 and 126,065.70

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Solution

The fourth proportional to 303,431.40, 455,256.45 and 126,065.70 is: 189,143.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,431.40 : 455,256.45 = 126,065.70 : x
  2. Step 2: Convert to fraction form
    303,431.40/455,256.45 = 126,065.70/x
  3. Step 3: Cross multiply
    303,431.40x = 455,256.45 × 126,065.70
  4. Step 4: Simplify right side
    303,431.40x = 57,392,223,048.77
  5. Step 5: Solve for x
    x = 57,392,223,048.77/303,431.40
  6. Step 6: Final answer
    x = 189,143.98

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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.