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Finding the Fourth Proportional to 614.26, 848.28 and 390.61

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Solution

The fourth proportional to 614.26, 848.28 and 390.61 is: 539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.26 : 848.28 = 390.61 : x
  2. Step 2: Convert to fraction form
    614.26/848.28 = 390.61/x
  3. Step 3: Cross multiply
    614.26x = 848.28 × 390.61
  4. Step 4: Simplify right side
    614.26x = 331,342.00
  5. Step 5: Solve for x
    x = 331,342.00/614.26
  6. Step 6: Final answer
    x = 539.42

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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.