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Finding the Fourth Proportional to 558.15, 836.04 and 520.17

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Solution

The fourth proportional to 558.15, 836.04 and 520.17 is: 779.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.15 : 836.04 = 520.17 : x
  2. Step 2: Convert to fraction form
    558.15/836.04 = 520.17/x
  3. Step 3: Cross multiply
    558.15x = 836.04 × 520.17
  4. Step 4: Simplify right side
    558.15x = 434,882.93
  5. Step 5: Solve for x
    x = 434,882.93/558.15
  6. Step 6: Final answer
    x = 779.15

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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.