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Finding the Fourth Proportional to 470.21, 703.94 and 425.10

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Solution

The fourth proportional to 470.21, 703.94 and 425.10 is: 636.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.21 : 703.94 = 425.10 : x
  2. Step 2: Convert to fraction form
    470.21/703.94 = 425.10/x
  3. Step 3: Cross multiply
    470.21x = 703.94 × 425.10
  4. Step 4: Simplify right side
    470.21x = 299,243.84
  5. Step 5: Solve for x
    x = 299,243.84/470.21
  6. Step 6: Final answer
    x = 636.41

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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.