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Finding the Fourth Proportional to 723.32, 1,085 and 450.20

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Solution

The fourth proportional to 723.32, 1,085 and 450.20 is: 675.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.32 : 1,085 = 450.20 : x
  2. Step 2: Convert to fraction form
    723.32/1,085 = 450.20/x
  3. Step 3: Cross multiply
    723.32x = 1,085 × 450.20
  4. Step 4: Simplify right side
    723.32x = 488,467
  5. Step 5: Solve for x
    x = 488,467/723.32
  6. Step 6: Final answer
    x = 675.31

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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.