Home / 1,372.60-2,056.20-823.15

Finding the Fourth Proportional to 1,372.60, 2,056.20 and 823.15

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Solution

The fourth proportional to 1,372.60, 2,056.20 and 823.15 is: 1,233.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.60 : 2,056.20 = 823.15 : x
  2. Step 2: Convert to fraction form
    1,372.60/2,056.20 = 823.15/x
  3. Step 3: Cross multiply
    1,372.60x = 2,056.20 × 823.15
  4. Step 4: Simplify right side
    1,372.60x = 1,692,561.03
  5. Step 5: Solve for x
    x = 1,692,561.03/1,372.60
  6. Step 6: Final answer
    x = 1,233.11

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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.