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Finding the Fourth Proportional to 319,885.76, 441,445.92 and 176,645.60

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Solution

The fourth proportional to 319,885.76, 441,445.92 and 176,645.60 is: 243,772.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,885.76 : 441,445.92 = 176,645.60 : x
  2. Step 2: Convert to fraction form
    319,885.76/441,445.92 = 176,645.60/x
  3. Step 3: Cross multiply
    319,885.76x = 441,445.92 × 176,645.60
  4. Step 4: Simplify right side
    319,885.76x = 77,979,479,405.95
  5. Step 5: Solve for x
    x = 77,979,479,405.95/319,885.76
  6. Step 6: Final answer
    x = 243,772.90

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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.