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Finding the Fourth Proportional to 1,283.88, 1,770.13 and 863.34

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Solution

The fourth proportional to 1,283.88, 1,770.13 and 863.34 is: 1,190.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.88 : 1,770.13 = 863.34 : x
  2. Step 2: Convert to fraction form
    1,283.88/1,770.13 = 863.34/x
  3. Step 3: Cross multiply
    1,283.88x = 1,770.13 × 863.34
  4. Step 4: Simplify right side
    1,283.88x = 1,528,226.00
  5. Step 5: Solve for x
    x = 1,528,226.00/1,283.88
  6. Step 6: Final answer
    x = 1,190.31

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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.