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Finding the Fourth Proportional to 1,191.27, 1,644.19 and 693.90

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Solution

The fourth proportional to 1,191.27, 1,644.19 and 693.90 is: 957.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.27 : 1,644.19 = 693.90 : x
  2. Step 2: Convert to fraction form
    1,191.27/1,644.19 = 693.90/x
  3. Step 3: Cross multiply
    1,191.27x = 1,644.19 × 693.90
  4. Step 4: Simplify right side
    1,191.27x = 1,140,901.71
  5. Step 5: Solve for x
    x = 1,140,901.71/1,191.27
  6. Step 6: Final answer
    x = 957.72

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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.