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Finding the Fourth Proportional to 772.37, 1,157.13 and 609.56

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Solution

The fourth proportional to 772.37, 1,157.13 and 609.56 is: 913.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.37 : 1,157.13 = 609.56 : x
  2. Step 2: Convert to fraction form
    772.37/1,157.13 = 609.56/x
  3. Step 3: Cross multiply
    772.37x = 1,157.13 × 609.56
  4. Step 4: Simplify right side
    772.37x = 705,334.38
  5. Step 5: Solve for x
    x = 705,334.38/772.37
  6. Step 6: Final answer
    x = 913.21

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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.