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Finding the Fourth Proportional to 1,607.28, 2,218.08 and 908.64

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Solution

The fourth proportional to 1,607.28, 2,218.08 and 908.64 is: 1,253.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.28 : 2,218.08 = 908.64 : x
  2. Step 2: Convert to fraction form
    1,607.28/2,218.08 = 908.64/x
  3. Step 3: Cross multiply
    1,607.28x = 2,218.08 × 908.64
  4. Step 4: Simplify right side
    1,607.28x = 2,015,436.21
  5. Step 5: Solve for x
    x = 2,015,436.21/1,607.28
  6. Step 6: Final answer
    x = 1,253.94

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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.