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Finding the Fourth Proportional to 656.67, 906.45 and 435.70

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Solution

The fourth proportional to 656.67, 906.45 and 435.70 is: 601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.67 : 906.45 = 435.70 : x
  2. Step 2: Convert to fraction form
    656.67/906.45 = 435.70/x
  3. Step 3: Cross multiply
    656.67x = 906.45 × 435.70
  4. Step 4: Simplify right side
    656.67x = 394,935.73
  5. Step 5: Solve for x
    x = 394,935.73/656.67
  6. Step 6: Final answer
    x = 601.42

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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.