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Finding the Fourth Proportional to 1,282.56, 1,923.84 and 632.64

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Solution

The fourth proportional to 1,282.56, 1,923.84 and 632.64 is: 948.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.56 : 1,923.84 = 632.64 : x
  2. Step 2: Convert to fraction form
    1,282.56/1,923.84 = 632.64/x
  3. Step 3: Cross multiply
    1,282.56x = 1,923.84 × 632.64
  4. Step 4: Simplify right side
    1,282.56x = 1,217,098.14
  5. Step 5: Solve for x
    x = 1,217,098.14/1,282.56
  6. Step 6: Final answer
    x = 948.96

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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.