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Finding the Fourth Proportional to 720, 993.84 and 533.52

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Solution

The fourth proportional to 720, 993.84 and 533.52 is: 736.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    720 : 993.84 = 533.52 : x
  2. Step 2: Convert to fraction form
    720/993.84 = 533.52/x
  3. Step 3: Cross multiply
    720x = 993.84 × 533.52
  4. Step 4: Simplify right side
    720x = 530,233.52
  5. Step 5: Solve for x
    x = 530,233.52/720
  6. Step 6: Final answer
    x = 736.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.