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Finding the Fourth Proportional to 1,392.59, 2,090.25 and 662.69

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Solution

The fourth proportional to 1,392.59, 2,090.25 and 662.69 is: 994.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.59 : 2,090.25 = 662.69 : x
  2. Step 2: Convert to fraction form
    1,392.59/2,090.25 = 662.69/x
  3. Step 3: Cross multiply
    1,392.59x = 2,090.25 × 662.69
  4. Step 4: Simplify right side
    1,392.59x = 1,385,177.32
  5. Step 5: Solve for x
    x = 1,385,177.32/1,392.59
  6. Step 6: Final answer
    x = 994.68

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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.