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Finding the Fourth Proportional to 441.06, 607.95 and 391.86

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Solution

The fourth proportional to 441.06, 607.95 and 391.86 is: 540.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.06 : 607.95 = 391.86 : x
  2. Step 2: Convert to fraction form
    441.06/607.95 = 391.86/x
  3. Step 3: Cross multiply
    441.06x = 607.95 × 391.86
  4. Step 4: Simplify right side
    441.06x = 238,231.29
  5. Step 5: Solve for x
    x = 238,231.29/441.06
  6. Step 6: Final answer
    x = 540.13

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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.