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Finding the Fourth Proportional to 802.69, 1,107.57 and 448.57

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Solution

The fourth proportional to 802.69, 1,107.57 and 448.57 is: 618.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.69 : 1,107.57 = 448.57 : x
  2. Step 2: Convert to fraction form
    802.69/1,107.57 = 448.57/x
  3. Step 3: Cross multiply
    802.69x = 1,107.57 × 448.57
  4. Step 4: Simplify right side
    802.69x = 496,822.67
  5. Step 5: Solve for x
    x = 496,822.67/802.69
  6. Step 6: Final answer
    x = 618.95

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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.