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Finding the Fourth Proportional to 1,141.96, 1,711.26 and 621.88

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Solution

The fourth proportional to 1,141.96, 1,711.26 and 621.88 is: 931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.96 : 1,711.26 = 621.88 : x
  2. Step 2: Convert to fraction form
    1,141.96/1,711.26 = 621.88/x
  3. Step 3: Cross multiply
    1,141.96x = 1,711.26 × 621.88
  4. Step 4: Simplify right side
    1,141.96x = 1,064,198.37
  5. Step 5: Solve for x
    x = 1,064,198.37/1,141.96
  6. Step 6: Final answer
    x = 931.91

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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.