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Finding the Fourth Proportional to 465.62, 698.72 and 420.03

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Solution

The fourth proportional to 465.62, 698.72 and 420.03 is: 630.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.62 : 698.72 = 420.03 : x
  2. Step 2: Convert to fraction form
    465.62/698.72 = 420.03/x
  3. Step 3: Cross multiply
    465.62x = 698.72 × 420.03
  4. Step 4: Simplify right side
    465.62x = 293,481.26
  5. Step 5: Solve for x
    x = 293,481.26/465.62
  6. Step 6: Final answer
    x = 630.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.