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Finding the Fourth Proportional to 1,145.14, 1,717.61 and 559.91

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Solution

The fourth proportional to 1,145.14, 1,717.61 and 559.91 is: 839.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.14 : 1,717.61 = 559.91 : x
  2. Step 2: Convert to fraction form
    1,145.14/1,717.61 = 559.91/x
  3. Step 3: Cross multiply
    1,145.14x = 1,717.61 × 559.91
  4. Step 4: Simplify right side
    1,145.14x = 961,708.51
  5. Step 5: Solve for x
    x = 961,708.51/1,145.14
  6. Step 6: Final answer
    x = 839.82

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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.