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Finding the Fourth Proportional to 470.37, 702.20 and 408.87

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Solution

The fourth proportional to 470.37, 702.20 and 408.87 is: 610.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.37 : 702.20 = 408.87 : x
  2. Step 2: Convert to fraction form
    470.37/702.20 = 408.87/x
  3. Step 3: Cross multiply
    470.37x = 702.20 × 408.87
  4. Step 4: Simplify right side
    470.37x = 287,106.47
  5. Step 5: Solve for x
    x = 287,106.47/470.37
  6. Step 6: Final answer
    x = 610.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.