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Finding the Fourth Proportional to 330,391.20, 455,945.52 and 187,147.68

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Solution

The fourth proportional to 330,391.20, 455,945.52 and 187,147.68 is: 258,267.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,391.20 : 455,945.52 = 187,147.68 : x
  2. Step 2: Convert to fraction form
    330,391.20/455,945.52 = 187,147.68/x
  3. Step 3: Cross multiply
    330,391.20x = 455,945.52 × 187,147.68
  4. Step 4: Simplify right side
    330,391.20x = 85,329,146,274.39
  5. Step 5: Solve for x
    x = 85,329,146,274.39/330,391.20
  6. Step 6: Final answer
    x = 258,267.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.