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Finding the Fourth Proportional to 720.73, 993.22 and 513.37

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Solution

The fourth proportional to 720.73, 993.22 and 513.37 is: 707.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.73 : 993.22 = 513.37 : x
  2. Step 2: Convert to fraction form
    720.73/993.22 = 513.37/x
  3. Step 3: Cross multiply
    720.73x = 993.22 × 513.37
  4. Step 4: Simplify right side
    720.73x = 509,889.35
  5. Step 5: Solve for x
    x = 509,889.35/720.73
  6. Step 6: Final answer
    x = 707.46

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1.5x scale

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.