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Finding the Fourth Proportional to 515.84, 769.94 and 479.72

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Solution

The fourth proportional to 515.84, 769.94 and 479.72 is: 716.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.84 : 769.94 = 479.72 : x
  2. Step 2: Convert to fraction form
    515.84/769.94 = 479.72/x
  3. Step 3: Cross multiply
    515.84x = 769.94 × 479.72
  4. Step 4: Simplify right side
    515.84x = 369,355.62
  5. Step 5: Solve for x
    x = 369,355.62/515.84
  6. Step 6: Final answer
    x = 716.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.