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Finding the Fourth Proportional to 497.21, 686.25 and 300.67

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Solution

The fourth proportional to 497.21, 686.25 and 300.67 is: 414.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.21 : 686.25 = 300.67 : x
  2. Step 2: Convert to fraction form
    497.21/686.25 = 300.67/x
  3. Step 3: Cross multiply
    497.21x = 686.25 × 300.67
  4. Step 4: Simplify right side
    497.21x = 206,333.07
  5. Step 5: Solve for x
    x = 206,333.07/497.21
  6. Step 6: Final answer
    x = 414.99

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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.