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Finding the Fourth Proportional to 321,148.80, 443,329.20 and 230,947.20

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Solution

The fourth proportional to 321,148.80, 443,329.20 and 230,947.20 is: 318,810.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,148.80 : 443,329.20 = 230,947.20 : x
  2. Step 2: Convert to fraction form
    321,148.80/443,329.20 = 230,947.20/x
  3. Step 3: Cross multiply
    321,148.80x = 443,329.20 × 230,947.20
  4. Step 4: Simplify right side
    321,148.80x = 102,385,637,418.24
  5. Step 5: Solve for x
    x = 102,385,637,418.24/321,148.80
  6. Step 6: Final answer
    x = 318,810.59

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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.