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Finding the Fourth Proportional to 1,588.60, 2,382.90 and 418.60

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Solution

The fourth proportional to 1,588.60, 2,382.90 and 418.60 is: 627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588.60 : 2,382.90 = 418.60 : x
  2. Step 2: Convert to fraction form
    1,588.60/2,382.90 = 418.60/x
  3. Step 3: Cross multiply
    1,588.60x = 2,382.90 × 418.60
  4. Step 4: Simplify right side
    1,588.60x = 997,481.94
  5. Step 5: Solve for x
    x = 997,481.94/1,588.60
  6. Step 6: Final answer
    x = 627.90

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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.