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Finding the Fourth Proportional to 1,232.84, 1,700.87 and 813.40

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Solution

The fourth proportional to 1,232.84, 1,700.87 and 813.40 is: 1,122.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.84 : 1,700.87 = 813.40 : x
  2. Step 2: Convert to fraction form
    1,232.84/1,700.87 = 813.40/x
  3. Step 3: Cross multiply
    1,232.84x = 1,700.87 × 813.40
  4. Step 4: Simplify right side
    1,232.84x = 1,383,479.34
  5. Step 5: Solve for x
    x = 1,383,479.34/1,232.84
  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.