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Finding the Fourth Proportional to 611.61, 843.39 and 425.31

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Solution

The fourth proportional to 611.61, 843.39 and 425.31 is: 586.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.61 : 843.39 = 425.31 : x
  2. Step 2: Convert to fraction form
    611.61/843.39 = 425.31/x
  3. Step 3: Cross multiply
    611.61x = 843.39 × 425.31
  4. Step 4: Simplify right side
    611.61x = 358,702.20
  5. Step 5: Solve for x
    x = 358,702.20/611.61
  6. Step 6: Final answer
    x = 586.49

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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.