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Finding the Fourth Proportional to 321,278.90, 443,367.45 and 178,041.32

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Solution

The fourth proportional to 321,278.90, 443,367.45 and 178,041.32 is: 245,698.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,278.90 : 443,367.45 = 178,041.32 : x
  2. Step 2: Convert to fraction form
    321,278.90/443,367.45 = 178,041.32/x
  3. Step 3: Cross multiply
    321,278.90x = 443,367.45 × 178,041.32
  4. Step 4: Simplify right side
    321,278.90x = 78,937,726,043.03
  5. Step 5: Solve for x
    x = 78,937,726,043.03/321,278.90
  6. Step 6: Final answer
    x = 245,698.44

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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.