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Finding the Fourth Proportional to 3,398.95, 4,690.32 and 1,906.87

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Solution

The fourth proportional to 3,398.95, 4,690.32 and 1,906.87 is: 2,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.95 : 4,690.32 = 1,906.87 : x
  2. Step 2: Convert to fraction form
    3,398.95/4,690.32 = 1,906.87/x
  3. Step 3: Cross multiply
    3,398.95x = 4,690.32 × 1,906.87
  4. Step 4: Simplify right side
    3,398.95x = 8,943,807.05
  5. Step 5: Solve for x
    x = 8,943,807.05/3,398.95
  6. Step 6: Final answer
    x = 2,631.35

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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.