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Finding the Fourth Proportional to 491,178.76, 677,578.56 and 287,096.34

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Solution

The fourth proportional to 491,178.76, 677,578.56 and 287,096.34 is: 396,047.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,178.76 : 677,578.56 = 287,096.34 : x
  2. Step 2: Convert to fraction form
    491,178.76/677,578.56 = 287,096.34/x
  3. Step 3: Cross multiply
    491,178.76x = 677,578.56 × 287,096.34
  4. Step 4: Simplify right side
    491,178.76x = 194,530,324,638.47
  5. Step 5: Solve for x
    x = 194,530,324,638.47/491,178.76
  6. Step 6: Final answer
    x = 396,047.92

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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.