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Finding the Fourth Proportional to 802.05, 1,106.81 and 447.94

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Solution

The fourth proportional to 802.05, 1,106.81 and 447.94 is: 618.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.05 : 1,106.81 = 447.94 : x
  2. Step 2: Convert to fraction form
    802.05/1,106.81 = 447.94/x
  3. Step 3: Cross multiply
    802.05x = 1,106.81 × 447.94
  4. Step 4: Simplify right side
    802.05x = 495,784.47
  5. Step 5: Solve for x
    x = 495,784.47/802.05
  6. Step 6: Final answer
    x = 618.15

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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.