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Finding the Fourth Proportional to 656.11, 905.85 and 457.36

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Solution

The fourth proportional to 656.11, 905.85 and 457.36 is: 631.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.11 : 905.85 = 457.36 : x
  2. Step 2: Convert to fraction form
    656.11/905.85 = 457.36/x
  3. Step 3: Cross multiply
    656.11x = 905.85 × 457.36
  4. Step 4: Simplify right side
    656.11x = 414,295.03
  5. Step 5: Solve for x
    x = 414,295.03/656.11
  6. Step 6: Final answer
    x = 631.45

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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.