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Finding the Fourth Proportional to 321,554.40, 443,708.40 and 178,278.24

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Solution

The fourth proportional to 321,554.40, 443,708.40 and 178,278.24 is: 246,003.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,554.40 : 443,708.40 = 178,278.24 : x
  2. Step 2: Convert to fraction form
    321,554.40/443,708.40 = 178,278.24/x
  3. Step 3: Cross multiply
    321,554.40x = 443,708.40 × 178,278.24
  4. Step 4: Simplify right side
    321,554.40x = 79,103,552,625.22
  5. Step 5: Solve for x
    x = 79,103,552,625.22/321,554.40
  6. Step 6: Final answer
    x = 246,003.64

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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.