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Finding the Fourth Proportional to 515.95, 770.13 and 479.84

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Solution

The fourth proportional to 515.95, 770.13 and 479.84 is: 716.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.95 : 770.13 = 479.84 : x
  2. Step 2: Convert to fraction form
    515.95/770.13 = 479.84/x
  3. Step 3: Cross multiply
    515.95x = 770.13 × 479.84
  4. Step 4: Simplify right side
    515.95x = 369,535.33
  5. Step 5: Solve for x
    x = 369,535.33/515.95
  6. Step 6: Final answer
    x = 716.23

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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.