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Finding the Fourth Proportional to 515.64, 772.41 and 359.65

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Solution

The fourth proportional to 515.64, 772.41 and 359.65 is: 538.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.64 : 772.41 = 359.65 : x
  2. Step 2: Convert to fraction form
    515.64/772.41 = 359.65/x
  3. Step 3: Cross multiply
    515.64x = 772.41 × 359.65
  4. Step 4: Simplify right side
    515.64x = 277,797.26
  5. Step 5: Solve for x
    x = 277,797.26/515.64
  6. Step 6: Final answer
    x = 538.74

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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.