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Finding the Fourth Proportional to 2,370.60, 3,555.90 and 639.22

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Solution

The fourth proportional to 2,370.60, 3,555.90 and 639.22 is: 958.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,370.60 : 3,555.90 = 639.22 : x
  2. Step 2: Convert to fraction form
    2,370.60/3,555.90 = 639.22/x
  3. Step 3: Cross multiply
    2,370.60x = 3,555.90 × 639.22
  4. Step 4: Simplify right side
    2,370.60x = 2,273,002.40
  5. Step 5: Solve for x
    x = 2,273,002.40/2,370.60
  6. Step 6: Final answer
    x = 958.83

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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.