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Finding the Fourth Proportional to 938, 1,407.64 and 563.06

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Solution

The fourth proportional to 938, 1,407.64 and 563.06 is: 844.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    938 : 1,407.64 = 563.06 : x
  2. Step 2: Convert to fraction form
    938/1,407.64 = 563.06/x
  3. Step 3: Cross multiply
    938x = 1,407.64 × 563.06
  4. Step 4: Simplify right side
    938x = 792,585.78
  5. Step 5: Solve for x
    x = 792,585.78/938
  6. Step 6: Final answer
    x = 844.97

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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.