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Finding the Fourth Proportional to 1,095.54, 1,643.67 and 518.28

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Solution

The fourth proportional to 1,095.54, 1,643.67 and 518.28 is: 777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.54 : 1,643.67 = 518.28 : x
  2. Step 2: Convert to fraction form
    1,095.54/1,643.67 = 518.28/x
  3. Step 3: Cross multiply
    1,095.54x = 1,643.67 × 518.28
  4. Step 4: Simplify right side
    1,095.54x = 851,881.29
  5. Step 5: Solve for x
    x = 851,881.29/1,095.54
  6. Step 6: Final answer
    x = 777.59

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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.