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Finding the Fourth Proportional to 611.16, 917.04 and 286.47

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Solution

The fourth proportional to 611.16, 917.04 and 286.47 is: 429.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.16 : 917.04 = 286.47 : x
  2. Step 2: Convert to fraction form
    611.16/917.04 = 286.47/x
  3. Step 3: Cross multiply
    611.16x = 917.04 × 286.47
  4. Step 4: Simplify right side
    611.16x = 262,704.45
  5. Step 5: Solve for x
    x = 262,704.45/611.16
  6. Step 6: Final answer
    x = 429.85

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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.