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Finding the Fourth Proportional to 1,563.41, 2,346.10 and 638.98

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Solution

The fourth proportional to 1,563.41, 2,346.10 and 638.98 is: 958.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.41 : 2,346.10 = 638.98 : x
  2. Step 2: Convert to fraction form
    1,563.41/2,346.10 = 638.98/x
  3. Step 3: Cross multiply
    1,563.41x = 2,346.10 × 638.98
  4. Step 4: Simplify right side
    1,563.41x = 1,499,103.52
  5. Step 5: Solve for x
    x = 1,499,103.52/1,563.41
  6. Step 6: Final answer
    x = 958.87

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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.