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Finding the Fourth Proportional to 935.45, 1,401.91 and 447.53

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Solution

The fourth proportional to 935.45, 1,401.91 and 447.53 is: 670.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.45 : 1,401.91 = 447.53 : x
  2. Step 2: Convert to fraction form
    935.45/1,401.91 = 447.53/x
  3. Step 3: Cross multiply
    935.45x = 1,401.91 × 447.53
  4. Step 4: Simplify right side
    935.45x = 627,388.65
  5. Step 5: Solve for x
    x = 627,388.65/935.45
  6. Step 6: Final answer
    x = 670.68

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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.