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Finding the Fourth Proportional to 321,458.71, 443,623.53 and 178,232.08

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Solution

The fourth proportional to 321,458.71, 443,623.53 and 178,232.08 is: 245,966.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,458.71 : 443,623.53 = 178,232.08 : x
  2. Step 2: Convert to fraction form
    321,458.71/443,623.53 = 178,232.08/x
  3. Step 3: Cross multiply
    321,458.71x = 443,623.53 × 178,232.08
  4. Step 4: Simplify right side
    321,458.71x = 79,067,944,048.15
  5. Step 5: Solve for x
    x = 79,067,944,048.15/321,458.71
  6. Step 6: Final answer
    x = 245,966.10

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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.