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Finding the Fourth Proportional to 1,004.26, 1,386.30 and 611.42

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Solution

The fourth proportional to 1,004.26, 1,386.30 and 611.42 is: 844.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.26 : 1,386.30 = 611.42 : x
  2. Step 2: Convert to fraction form
    1,004.26/1,386.30 = 611.42/x
  3. Step 3: Cross multiply
    1,004.26x = 1,386.30 × 611.42
  4. Step 4: Simplify right side
    1,004.26x = 847,611.55
  5. Step 5: Solve for x
    x = 847,611.55/1,004.26
  6. Step 6: Final answer
    x = 844.02

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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.