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Finding the Fourth Proportional to 2,370.57, 3,555.89 and 639.20

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Solution

The fourth proportional to 2,370.57, 3,555.89 and 639.20 is: 958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,370.57 : 3,555.89 = 639.20 : x
  2. Step 2: Convert to fraction form
    2,370.57/3,555.89 = 639.20/x
  3. Step 3: Cross multiply
    2,370.57x = 3,555.89 × 639.20
  4. Step 4: Simplify right side
    2,370.57x = 2,272,903.91
  5. Step 5: Solve for x
    x = 2,272,903.91/2,370.57
  6. Step 6: Final answer
    x = 958.80

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1.5x scale

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.