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Finding the Fourth Proportional to 618.26, 926.17 and 386.60

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Solution

The fourth proportional to 618.26, 926.17 and 386.60 is: 579.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.26 : 926.17 = 386.60 : x
  2. Step 2: Convert to fraction form
    618.26/926.17 = 386.60/x
  3. Step 3: Cross multiply
    618.26x = 926.17 × 386.60
  4. Step 4: Simplify right side
    618.26x = 358,057.32
  5. Step 5: Solve for x
    x = 358,057.32/618.26
  6. Step 6: Final answer
    x = 579.14

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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.