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Finding the Fourth Proportional to 573.09, 859.58 and 207.78

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Solution

The fourth proportional to 573.09, 859.58 and 207.78 is: 311.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.09 : 859.58 = 207.78 : x
  2. Step 2: Convert to fraction form
    573.09/859.58 = 207.78/x
  3. Step 3: Cross multiply
    573.09x = 859.58 × 207.78
  4. Step 4: Simplify right side
    573.09x = 178,600.05
  5. Step 5: Solve for x
    x = 178,600.05/573.09
  6. Step 6: Final answer
    x = 311.65

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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.