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Finding the Fourth Proportional to 6,398.34, 9,612.78 and 4,178.99

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Solution

The fourth proportional to 6,398.34, 9,612.78 and 4,178.99 is: 6,278.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,398.34 : 9,612.78 = 4,178.99 : x
  2. Step 2: Convert to fraction form
    6,398.34/9,612.78 = 4,178.99/x
  3. Step 3: Cross multiply
    6,398.34x = 9,612.78 × 4,178.99
  4. Step 4: Simplify right side
    6,398.34x = 40,171,719.85
  5. Step 5: Solve for x
    x = 40,171,719.85/6,398.34
  6. Step 6: Final answer
    x = 6,278.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.