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Finding the Fourth Proportional to 1,191.84, 1,789.92 and 975.84

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Solution

The fourth proportional to 1,191.84, 1,789.92 and 975.84 is: 1,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.84 : 1,789.92 = 975.84 : x
  2. Step 2: Convert to fraction form
    1,191.84/1,789.92 = 975.84/x
  3. Step 3: Cross multiply
    1,191.84x = 1,789.92 × 975.84
  4. Step 4: Simplify right side
    1,191.84x = 1,746,675.53
  5. Step 5: Solve for x
    x = 1,746,675.53/1,191.84
  6. Step 6: Final answer
    x = 1,465.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.