Home / 1,370.20-2,056.08-823.72

Finding the Fourth Proportional to 1,370.20, 2,056.08 and 823.72

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Solution

The fourth proportional to 1,370.20, 2,056.08 and 823.72 is: 1,236.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.20 : 2,056.08 = 823.72 : x
  2. Step 2: Convert to fraction form
    1,370.20/2,056.08 = 823.72/x
  3. Step 3: Cross multiply
    1,370.20x = 2,056.08 × 823.72
  4. Step 4: Simplify right side
    1,370.20x = 1,693,634.22
  5. Step 5: Solve for x
    x = 1,693,634.22/1,370.20
  6. Step 6: Final answer
    x = 1,236.05

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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.