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Finding the Fourth Proportional to 1,059.96, 1,589.94 and 625.80

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Solution

The fourth proportional to 1,059.96, 1,589.94 and 625.80 is: 938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.96 : 1,589.94 = 625.80 : x
  2. Step 2: Convert to fraction form
    1,059.96/1,589.94 = 625.80/x
  3. Step 3: Cross multiply
    1,059.96x = 1,589.94 × 625.80
  4. Step 4: Simplify right side
    1,059.96x = 994,984.45
  5. Step 5: Solve for x
    x = 994,984.45/1,059.96
  6. Step 6: Final answer
    x = 938.70

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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.