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Finding the Fourth Proportional to 657.10, 906.42 and 395.07

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Solution

The fourth proportional to 657.10, 906.42 and 395.07 is: 544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.10 : 906.42 = 395.07 : x
  2. Step 2: Convert to fraction form
    657.10/906.42 = 395.07/x
  3. Step 3: Cross multiply
    657.10x = 906.42 × 395.07
  4. Step 4: Simplify right side
    657.10x = 358,099.35
  5. Step 5: Solve for x
    x = 358,099.35/657.10
  6. Step 6: Final answer
    x = 544.97

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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.