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Finding the Fourth Proportional to 619.26, 854.30 and 386.26

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Solution

The fourth proportional to 619.26, 854.30 and 386.26 is: 532.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.26 : 854.30 = 386.26 : x
  2. Step 2: Convert to fraction form
    619.26/854.30 = 386.26/x
  3. Step 3: Cross multiply
    619.26x = 854.30 × 386.26
  4. Step 4: Simplify right side
    619.26x = 329,981.92
  5. Step 5: Solve for x
    x = 329,981.92/619.26
  6. Step 6: Final answer
    x = 532.86

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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.