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Finding the Fourth Proportional to 416.69, 626.17 and 389.60

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Solution

The fourth proportional to 416.69, 626.17 and 389.60 is: 585.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.69 : 626.17 = 389.60 : x
  2. Step 2: Convert to fraction form
    416.69/626.17 = 389.60/x
  3. Step 3: Cross multiply
    416.69x = 626.17 × 389.60
  4. Step 4: Simplify right side
    416.69x = 243,955.83
  5. Step 5: Solve for x
    x = 243,955.83/416.69
  6. Step 6: Final answer
    x = 585.46

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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.