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Finding the Fourth Proportional to 510.21, 704.10 and 289.11

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Solution

The fourth proportional to 510.21, 704.10 and 289.11 is: 398.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.21 : 704.10 = 289.11 : x
  2. Step 2: Convert to fraction form
    510.21/704.10 = 289.11/x
  3. Step 3: Cross multiply
    510.21x = 704.10 × 289.11
  4. Step 4: Simplify right side
    510.21x = 203,562.35
  5. Step 5: Solve for x
    x = 203,562.35/510.21
  6. Step 6: Final answer
    x = 398.98

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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.