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Finding the Fourth Proportional to 657.15, 906.26 and 479.83

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Solution

The fourth proportional to 657.15, 906.26 and 479.83 is: 661.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.15 : 906.26 = 479.83 : x
  2. Step 2: Convert to fraction form
    657.15/906.26 = 479.83/x
  3. Step 3: Cross multiply
    657.15x = 906.26 × 479.83
  4. Step 4: Simplify right side
    657.15x = 434,850.37
  5. Step 5: Solve for x
    x = 434,850.37/657.15
  6. Step 6: Final answer
    x = 661.72

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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.