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Finding the Fourth Proportional to 1,284.08, 1,926.04 and 634.64

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Solution

The fourth proportional to 1,284.08, 1,926.04 and 634.64 is: 951.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.08 : 1,926.04 = 634.64 : x
  2. Step 2: Convert to fraction form
    1,284.08/1,926.04 = 634.64/x
  3. Step 3: Cross multiply
    1,284.08x = 1,926.04 × 634.64
  4. Step 4: Simplify right side
    1,284.08x = 1,222,342.03
  5. Step 5: Solve for x
    x = 1,222,342.03/1,284.08
  6. Step 6: Final answer
    x = 951.92

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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.