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Finding the Fourth Proportional to 1,373.46, 1,895.52 and 813.90

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Solution

The fourth proportional to 1,373.46, 1,895.52 and 813.90 is: 1,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.46 : 1,895.52 = 813.90 : x
  2. Step 2: Convert to fraction form
    1,373.46/1,895.52 = 813.90/x
  3. Step 3: Cross multiply
    1,373.46x = 1,895.52 × 813.90
  4. Step 4: Simplify right side
    1,373.46x = 1,542,763.73
  5. Step 5: Solve for x
    x = 1,542,763.73/1,373.46
  6. Step 6: Final answer
    x = 1,123.27

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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.