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Finding the Fourth Proportional to 615.68, 919.18 and 529.04

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Solution

The fourth proportional to 615.68, 919.18 and 529.04 is: 789.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.68 : 919.18 = 529.04 : x
  2. Step 2: Convert to fraction form
    615.68/919.18 = 529.04/x
  3. Step 3: Cross multiply
    615.68x = 919.18 × 529.04
  4. Step 4: Simplify right side
    615.68x = 486,282.99
  5. Step 5: Solve for x
    x = 486,282.99/615.68
  6. Step 6: Final answer
    x = 789.83

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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.