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Finding the Fourth Proportional to 1,079.67, 1,619.73 and 349.30

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Solution

The fourth proportional to 1,079.67, 1,619.73 and 349.30 is: 524.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.67 : 1,619.73 = 349.30 : x
  2. Step 2: Convert to fraction form
    1,079.67/1,619.73 = 349.30/x
  3. Step 3: Cross multiply
    1,079.67x = 1,619.73 × 349.30
  4. Step 4: Simplify right side
    1,079.67x = 565,771.69
  5. Step 5: Solve for x
    x = 565,771.69/1,079.67
  6. Step 6: Final answer
    x = 524.02

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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.