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Finding the Fourth Proportional to 321,142.32, 443,201.40 and 177,915.60

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Solution

The fourth proportional to 321,142.32, 443,201.40 and 177,915.60 is: 245,537.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,142.32 : 443,201.40 = 177,915.60 : x
  2. Step 2: Convert to fraction form
    321,142.32/443,201.40 = 177,915.60/x
  3. Step 3: Cross multiply
    321,142.32x = 443,201.40 × 177,915.60
  4. Step 4: Simplify right side
    321,142.32x = 78,852,443,001.84
  5. Step 5: Solve for x
    x = 78,852,443,001.84/321,142.32
  6. Step 6: Final answer
    x = 245,537.38

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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.