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Finding the Fourth Proportional to 1,170.79, 1,764.21 and 969.84

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Solution

The fourth proportional to 1,170.79, 1,764.21 and 969.84 is: 1,461.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.79 : 1,764.21 = 969.84 : x
  2. Step 2: Convert to fraction form
    1,170.79/1,764.21 = 969.84/x
  3. Step 3: Cross multiply
    1,170.79x = 1,764.21 × 969.84
  4. Step 4: Simplify right side
    1,170.79x = 1,711,005.06
  5. Step 5: Solve for x
    x = 1,711,005.06/1,170.79
  6. Step 6: Final answer
    x = 1,461.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.