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Finding the Fourth Proportional to 802.80, 1,107.81 and 471.42

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Solution

The fourth proportional to 802.80, 1,107.81 and 471.42 is: 650.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.80 : 1,107.81 = 471.42 : x
  2. Step 2: Convert to fraction form
    802.80/1,107.81 = 471.42/x
  3. Step 3: Cross multiply
    802.80x = 1,107.81 × 471.42
  4. Step 4: Simplify right side
    802.80x = 522,243.79
  5. Step 5: Solve for x
    x = 522,243.79/802.80
  6. Step 6: Final answer
    x = 650.53

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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.