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Finding the Fourth Proportional to 386.88, 580.50 and 366.22

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Solution

The fourth proportional to 386.88, 580.50 and 366.22 is: 549.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.88 : 580.50 = 366.22 : x
  2. Step 2: Convert to fraction form
    386.88/580.50 = 366.22/x
  3. Step 3: Cross multiply
    386.88x = 580.50 × 366.22
  4. Step 4: Simplify right side
    386.88x = 212,590.71
  5. Step 5: Solve for x
    x = 212,590.71/386.88
  6. Step 6: Final answer
    x = 549.50

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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.