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Finding the Fourth Proportional to 611.15, 918.08 and 572.27

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Solution

The fourth proportional to 611.15, 918.08 and 572.27 is: 859.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.15 : 918.08 = 572.27 : x
  2. Step 2: Convert to fraction form
    611.15/918.08 = 572.27/x
  3. Step 3: Cross multiply
    611.15x = 918.08 × 572.27
  4. Step 4: Simplify right side
    611.15x = 525,387.55
  5. Step 5: Solve for x
    x = 525,387.55/611.15
  6. Step 6: Final answer
    x = 859.68

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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.