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Finding the Fourth Proportional to 501.76, 691.23 and 412.66

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Solution

The fourth proportional to 501.76, 691.23 and 412.66 is: 568.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.76 : 691.23 = 412.66 : x
  2. Step 2: Convert to fraction form
    501.76/691.23 = 412.66/x
  3. Step 3: Cross multiply
    501.76x = 691.23 × 412.66
  4. Step 4: Simplify right side
    501.76x = 285,242.97
  5. Step 5: Solve for x
    x = 285,242.97/501.76
  6. Step 6: Final answer
    x = 568.48

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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.