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Finding the Fourth Proportional to 656.15, 905.87 and 435.41

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Solution

The fourth proportional to 656.15, 905.87 and 435.41 is: 601.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.15 : 905.87 = 435.41 : x
  2. Step 2: Convert to fraction form
    656.15/905.87 = 435.41/x
  3. Step 3: Cross multiply
    656.15x = 905.87 × 435.41
  4. Step 4: Simplify right side
    656.15x = 394,418.15
  5. Step 5: Solve for x
    x = 394,418.15/656.15
  6. Step 6: Final answer
    x = 601.11

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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.