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Finding the Fourth Proportional to 1,563.16, 2,344.59 and 638.75

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Solution

The fourth proportional to 1,563.16, 2,344.59 and 638.75 is: 958.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.16 : 2,344.59 = 638.75 : x
  2. Step 2: Convert to fraction form
    1,563.16/2,344.59 = 638.75/x
  3. Step 3: Cross multiply
    1,563.16x = 2,344.59 × 638.75
  4. Step 4: Simplify right side
    1,563.16x = 1,497,606.86
  5. Step 5: Solve for x
    x = 1,497,606.86/1,563.16
  6. Step 6: Final answer
    x = 958.06

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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.