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Finding the Fourth Proportional to 997.24, 1,496.40 and 420.52

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Solution

The fourth proportional to 997.24, 1,496.40 and 420.52 is: 631.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.24 : 1,496.40 = 420.52 : x
  2. Step 2: Convert to fraction form
    997.24/1,496.40 = 420.52/x
  3. Step 3: Cross multiply
    997.24x = 1,496.40 × 420.52
  4. Step 4: Simplify right side
    997.24x = 629,266.13
  5. Step 5: Solve for x
    x = 629,266.13/997.24
  6. Step 6: Final answer
    x = 631.01

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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.