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Finding the Fourth Proportional to 1,194.84, 1,646.46 and 862.20

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Solution

The fourth proportional to 1,194.84, 1,646.46 and 862.20 is: 1,188.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.84 : 1,646.46 = 862.20 : x
  2. Step 2: Convert to fraction form
    1,194.84/1,646.46 = 862.20/x
  3. Step 3: Cross multiply
    1,194.84x = 1,646.46 × 862.20
  4. Step 4: Simplify right side
    1,194.84x = 1,419,577.81
  5. Step 5: Solve for x
    x = 1,419,577.81/1,194.84
  6. Step 6: Final answer
    x = 1,188.09

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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.