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Finding the Fourth Proportional to 2,086.60, 3,130.08 and 625.72

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Solution

The fourth proportional to 2,086.60, 3,130.08 and 625.72 is: 938.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.60 : 3,130.08 = 625.72 : x
  2. Step 2: Convert to fraction form
    2,086.60/3,130.08 = 625.72/x
  3. Step 3: Cross multiply
    2,086.60x = 3,130.08 × 625.72
  4. Step 4: Simplify right side
    2,086.60x = 1,958,553.66
  5. Step 5: Solve for x
    x = 1,958,553.66/2,086.60
  6. Step 6: Final answer
    x = 938.63

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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.