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Finding the Fourth Proportional to 510.28, 704.20 and 289.22

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Solution

The fourth proportional to 510.28, 704.20 and 289.22 is: 399.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.28 : 704.20 = 289.22 : x
  2. Step 2: Convert to fraction form
    510.28/704.20 = 289.22/x
  3. Step 3: Cross multiply
    510.28x = 704.20 × 289.22
  4. Step 4: Simplify right side
    510.28x = 203,671.21
  5. Step 5: Solve for x
    x = 203,671.21/510.28
  6. Step 6: Final answer
    x = 399.14

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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.