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Finding the Fourth Proportional to 1,147.90, 1,722.66 and 499.09

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Solution

The fourth proportional to 1,147.90, 1,722.66 and 499.09 is: 748.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.90 : 1,722.66 = 499.09 : x
  2. Step 2: Convert to fraction form
    1,147.90/1,722.66 = 499.09/x
  3. Step 3: Cross multiply
    1,147.90x = 1,722.66 × 499.09
  4. Step 4: Simplify right side
    1,147.90x = 859,762.38
  5. Step 5: Solve for x
    x = 859,762.38/1,147.90
  6. Step 6: Final answer
    x = 748.99

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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.