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Finding the Fourth Proportional to 321,480.80, 443,621.82 and 185,520.40

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Solution

The fourth proportional to 321,480.80, 443,621.82 and 185,520.40 is: 256,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,480.80 : 443,621.82 = 185,520.40 : x
  2. Step 2: Convert to fraction form
    321,480.80/443,621.82 = 185,520.40/x
  3. Step 3: Cross multiply
    321,480.80x = 443,621.82 × 185,520.40
  4. Step 4: Simplify right side
    321,480.80x = 82,300,897,495.13
  5. Step 5: Solve for x
    x = 82,300,897,495.13/321,480.80
  6. Step 6: Final answer
    x = 256,005.64

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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.