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Finding the Fourth Proportional to 656.99, 906.63 and 358.22

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Solution

The fourth proportional to 656.99, 906.63 and 358.22 is: 494.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.99 : 906.63 = 358.22 : x
  2. Step 2: Convert to fraction form
    656.99/906.63 = 358.22/x
  3. Step 3: Cross multiply
    656.99x = 906.63 × 358.22
  4. Step 4: Simplify right side
    656.99x = 324,775.94
  5. Step 5: Solve for x
    x = 324,775.94/656.99
  6. Step 6: Final answer
    x = 494.34

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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.