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Finding the Fourth Proportional to 476.07, 717.11 and 425.31

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Solution

The fourth proportional to 476.07, 717.11 and 425.31 is: 640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.07 : 717.11 = 425.31 : x
  2. Step 2: Convert to fraction form
    476.07/717.11 = 425.31/x
  3. Step 3: Cross multiply
    476.07x = 717.11 × 425.31
  4. Step 4: Simplify right side
    476.07x = 304,991.93
  5. Step 5: Solve for x
    x = 304,991.93/476.07
  6. Step 6: Final answer
    x = 640.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.