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Finding the Fourth Proportional to 984.80, 1,477.20 and 335.48

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Solution

The fourth proportional to 984.80, 1,477.20 and 335.48 is: 503.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.80 : 1,477.20 = 335.48 : x
  2. Step 2: Convert to fraction form
    984.80/1,477.20 = 335.48/x
  3. Step 3: Cross multiply
    984.80x = 1,477.20 × 335.48
  4. Step 4: Simplify right side
    984.80x = 495,571.06
  5. Step 5: Solve for x
    x = 495,571.06/984.80
  6. Step 6: Final answer
    x = 503.22

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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.