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Finding the Fourth Proportional to 462.24, 693 and 438.48

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Solution

The fourth proportional to 462.24, 693 and 438.48 is: 657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.24 : 693 = 438.48 : x
  2. Step 2: Convert to fraction form
    462.24/693 = 438.48/x
  3. Step 3: Cross multiply
    462.24x = 693 × 438.48
  4. Step 4: Simplify right side
    462.24x = 303,866.64
  5. Step 5: Solve for x
    x = 303,866.64/462.24
  6. Step 6: Final answer
    x = 657.38

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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.