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Finding the Fourth Proportional to 492,616.28, 679,818.02 and 288,618.39

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Solution

The fourth proportional to 492,616.28, 679,818.02 and 288,618.39 is: 398,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,616.28 : 679,818.02 = 288,618.39 : x
  2. Step 2: Convert to fraction form
    492,616.28/679,818.02 = 288,618.39/x
  3. Step 3: Cross multiply
    492,616.28x = 679,818.02 × 288,618.39
  4. Step 4: Simplify right side
    492,616.28x = 196,207,980,982.30
  5. Step 5: Solve for x
    x = 196,207,980,982.30/492,616.28
  6. Step 6: Final answer
    x = 398,297.80

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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.