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Finding the Fourth Proportional to 1,089.71, 1,633.41 and 359.09

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Solution

The fourth proportional to 1,089.71, 1,633.41 and 359.09 is: 538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.71 : 1,633.41 = 359.09 : x
  2. Step 2: Convert to fraction form
    1,089.71/1,633.41 = 359.09/x
  3. Step 3: Cross multiply
    1,089.71x = 1,633.41 × 359.09
  4. Step 4: Simplify right side
    1,089.71x = 586,533.03
  5. Step 5: Solve for x
    x = 586,533.03/1,089.71
  6. Step 6: Final answer
    x = 538.25

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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.