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Finding the Fourth Proportional to 515.83, 773.64 and 284.65

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Solution

The fourth proportional to 515.83, 773.64 and 284.65 is: 426.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.83 : 773.64 = 284.65 : x
  2. Step 2: Convert to fraction form
    515.83/773.64 = 284.65/x
  3. Step 3: Cross multiply
    515.83x = 773.64 × 284.65
  4. Step 4: Simplify right side
    515.83x = 220,216.63
  5. Step 5: Solve for x
    x = 220,216.63/515.83
  6. Step 6: Final answer
    x = 426.92

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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.