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Finding the Fourth Proportional to 662.40, 912.24 and 603.99

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Solution

The fourth proportional to 662.40, 912.24 and 603.99 is: 831.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.40 : 912.24 = 603.99 : x
  2. Step 2: Convert to fraction form
    662.40/912.24 = 603.99/x
  3. Step 3: Cross multiply
    662.40x = 912.24 × 603.99
  4. Step 4: Simplify right side
    662.40x = 550,983.84
  5. Step 5: Solve for x
    x = 550,983.84/662.40
  6. Step 6: Final answer
    x = 831.80

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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.