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Finding the Fourth Proportional to 1,293.68, 1,939.12 and 636.01

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Solution

The fourth proportional to 1,293.68, 1,939.12 and 636.01 is: 953.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.68 : 1,939.12 = 636.01 : x
  2. Step 2: Convert to fraction form
    1,293.68/1,939.12 = 636.01/x
  3. Step 3: Cross multiply
    1,293.68x = 1,939.12 × 636.01
  4. Step 4: Simplify right side
    1,293.68x = 1,233,299.71
  5. Step 5: Solve for x
    x = 1,233,299.71/1,293.68
  6. Step 6: Final answer
    x = 953.33

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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.