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Finding the Fourth Proportional to 699.59, 1,053.47 and 518.27

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Solution

The fourth proportional to 699.59, 1,053.47 and 518.27 is: 780.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.59 : 1,053.47 = 518.27 : x
  2. Step 2: Convert to fraction form
    699.59/1,053.47 = 518.27/x
  3. Step 3: Cross multiply
    699.59x = 1,053.47 × 518.27
  4. Step 4: Simplify right side
    699.59x = 545,974.04
  5. Step 5: Solve for x
    x = 545,974.04/699.59
  6. Step 6: Final answer
    x = 780.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.