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Finding the Fourth Proportional to 1,140.29, 1,711.04 and 490.98

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Solution

The fourth proportional to 1,140.29, 1,711.04 and 490.98 is: 736.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.29 : 1,711.04 = 490.98 : x
  2. Step 2: Convert to fraction form
    1,140.29/1,711.04 = 490.98/x
  3. Step 3: Cross multiply
    1,140.29x = 1,711.04 × 490.98
  4. Step 4: Simplify right side
    1,140.29x = 840,083.96
  5. Step 5: Solve for x
    x = 840,083.96/1,140.29
  6. Step 6: Final answer
    x = 736.73

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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.