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Finding the Fourth Proportional to 476.37, 713.07 and 421.68

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Solution

The fourth proportional to 476.37, 713.07 and 421.68 is: 631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.37 : 713.07 = 421.68 : x
  2. Step 2: Convert to fraction form
    476.37/713.07 = 421.68/x
  3. Step 3: Cross multiply
    476.37x = 713.07 × 421.68
  4. Step 4: Simplify right side
    476.37x = 300,687.36
  5. Step 5: Solve for x
    x = 300,687.36/476.37
  6. Step 6: Final answer
    x = 631.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.