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Finding the Fourth Proportional to 303,391.45, 455,251.20 and 125,916.40

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Solution

The fourth proportional to 303,391.45, 455,251.20 and 125,916.40 is: 188,942.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,391.45 : 455,251.20 = 125,916.40 : x
  2. Step 2: Convert to fraction form
    303,391.45/455,251.20 = 125,916.40/x
  3. Step 3: Cross multiply
    303,391.45x = 455,251.20 × 125,916.40
  4. Step 4: Simplify right side
    303,391.45x = 57,323,592,199.68
  5. Step 5: Solve for x
    x = 57,323,592,199.68/303,391.45
  6. Step 6: Final answer
    x = 188,942.68

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1.5x scale

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.