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Finding the Fourth Proportional to 645.08, 968.40 and 462

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Solution

The fourth proportional to 645.08, 968.40 and 462 is: 693.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.08 : 968.40 = 462 : x
  2. Step 2: Convert to fraction form
    645.08/968.40 = 462/x
  3. Step 3: Cross multiply
    645.08x = 968.40 × 462
  4. Step 4: Simplify right side
    645.08x = 447,400.80
  5. Step 5: Solve for x
    x = 447,400.80/645.08
  6. Step 6: Final answer
    x = 693.56

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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.