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Finding the Fourth Proportional to 1,288.64, 1,932.27 and 410.87

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Solution

The fourth proportional to 1,288.64, 1,932.27 and 410.87 is: 616.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.64 : 1,932.27 = 410.87 : x
  2. Step 2: Convert to fraction form
    1,288.64/1,932.27 = 410.87/x
  3. Step 3: Cross multiply
    1,288.64x = 1,932.27 × 410.87
  4. Step 4: Simplify right side
    1,288.64x = 793,902.11
  5. Step 5: Solve for x
    x = 793,902.11/1,288.64
  6. Step 6: Final answer
    x = 616.08

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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.