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Finding the Fourth Proportional to 510.24, 702.92 and 399.56

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Solution

The fourth proportional to 510.24, 702.92 and 399.56 is: 550.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.24 : 702.92 = 399.56 : x
  2. Step 2: Convert to fraction form
    510.24/702.92 = 399.56/x
  3. Step 3: Cross multiply
    510.24x = 702.92 × 399.56
  4. Step 4: Simplify right side
    510.24x = 280,858.72
  5. Step 5: Solve for x
    x = 280,858.72/510.24
  6. Step 6: Final answer
    x = 550.44

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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.