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Finding the Fourth Proportional to 1,616.91, 2,230.80 and 908.64

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Solution

The fourth proportional to 1,616.91, 2,230.80 and 908.64 is: 1,253.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.91 : 2,230.80 = 908.64 : x
  2. Step 2: Convert to fraction form
    1,616.91/2,230.80 = 908.64/x
  3. Step 3: Cross multiply
    1,616.91x = 2,230.80 × 908.64
  4. Step 4: Simplify right side
    1,616.91x = 2,026,994.11
  5. Step 5: Solve for x
    x = 2,026,994.11/1,616.91
  6. Step 6: Final answer
    x = 1,253.62

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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.