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Finding the Fourth Proportional to 389.67, 584.75 and 359.61

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Solution

The fourth proportional to 389.67, 584.75 and 359.61 is: 539.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.67 : 584.75 = 359.61 : x
  2. Step 2: Convert to fraction form
    389.67/584.75 = 359.61/x
  3. Step 3: Cross multiply
    389.67x = 584.75 × 359.61
  4. Step 4: Simplify right side
    389.67x = 210,280.15
  5. Step 5: Solve for x
    x = 210,280.15/389.67
  6. Step 6: Final answer
    x = 539.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.