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Finding the Fourth Proportional to 330,229.76, 455,721.92 and 186,985.76

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Solution

The fourth proportional to 330,229.76, 455,721.92 and 186,985.76 is: 258,043.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,229.76 : 455,721.92 = 186,985.76 : x
  2. Step 2: Convert to fraction form
    330,229.76/455,721.92 = 186,985.76/x
  3. Step 3: Cross multiply
    330,229.76x = 455,721.92 × 186,985.76
  4. Step 4: Simplify right side
    330,229.76x = 85,213,509,559.86
  5. Step 5: Solve for x
    x = 85,213,509,559.86/330,229.76
  6. Step 6: Final answer
    x = 258,043.10

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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.