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Finding the Fourth Proportional to 720.99, 993.84 and 603.36

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Solution

The fourth proportional to 720.99, 993.84 and 603.36 is: 831.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.99 : 993.84 = 603.36 : x
  2. Step 2: Convert to fraction form
    720.99/993.84 = 603.36/x
  3. Step 3: Cross multiply
    720.99x = 993.84 × 603.36
  4. Step 4: Simplify right side
    720.99x = 599,643.30
  5. Step 5: Solve for x
    x = 599,643.30/720.99
  6. Step 6: Final answer
    x = 831.69

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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.