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Finding the Fourth Proportional to 1,337.50, 1,845.75 and 813.63

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Solution

The fourth proportional to 1,337.50, 1,845.75 and 813.63 is: 1,122.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.50 : 1,845.75 = 813.63 : x
  2. Step 2: Convert to fraction form
    1,337.50/1,845.75 = 813.63/x
  3. Step 3: Cross multiply
    1,337.50x = 1,845.75 × 813.63
  4. Step 4: Simplify right side
    1,337.50x = 1,501,757.57
  5. Step 5: Solve for x
    x = 1,501,757.57/1,337.50
  6. Step 6: Final answer
    x = 1,122.81

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1.5x scale

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.