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Finding the Fourth Proportional to 510.57, 704.60 and 289.53

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Solution

The fourth proportional to 510.57, 704.60 and 289.53 is: 399.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.57 : 704.60 = 289.53 : x
  2. Step 2: Convert to fraction form
    510.57/704.60 = 289.53/x
  3. Step 3: Cross multiply
    510.57x = 704.60 × 289.53
  4. Step 4: Simplify right side
    510.57x = 203,997.87
  5. Step 5: Solve for x
    x = 203,997.87/510.57
  6. Step 6: Final answer
    x = 399.55

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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.