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Finding the Fourth Proportional to 1,337, 1,845.02 and 813.20

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Solution

The fourth proportional to 1,337, 1,845.02 and 813.20 is: 1,122.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337 : 1,845.02 = 813.20 : x
  2. Step 2: Convert to fraction form
    1,337/1,845.02 = 813.20/x
  3. Step 3: Cross multiply
    1,337x = 1,845.02 × 813.20
  4. Step 4: Simplify right side
    1,337x = 1,500,370.26
  5. Step 5: Solve for x
    x = 1,500,370.26/1,337
  6. Step 6: Final answer
    x = 1,122.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.