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Finding the Fourth Proportional to 611.78, 918.57 and 593.55

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Solution

The fourth proportional to 611.78, 918.57 and 593.55 is: 891.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.78 : 918.57 = 593.55 : x
  2. Step 2: Convert to fraction form
    611.78/918.57 = 593.55/x
  3. Step 3: Cross multiply
    611.78x = 918.57 × 593.55
  4. Step 4: Simplify right side
    611.78x = 545,217.22
  5. Step 5: Solve for x
    x = 545,217.22/611.78
  6. Step 6: Final answer
    x = 891.21

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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.