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Finding the Fourth Proportional to 802.31, 1,107.17 and 448.23

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Solution

The fourth proportional to 802.31, 1,107.17 and 448.23 is: 618.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.31 : 1,107.17 = 448.23 : x
  2. Step 2: Convert to fraction form
    802.31/1,107.17 = 448.23/x
  3. Step 3: Cross multiply
    802.31x = 1,107.17 × 448.23
  4. Step 4: Simplify right side
    802.31x = 496,271.66
  5. Step 5: Solve for x
    x = 496,271.66/802.31
  6. Step 6: Final answer
    x = 618.56

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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.