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Finding the Fourth Proportional to 762.37, 1,144.07 and 415.75

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Solution

The fourth proportional to 762.37, 1,144.07 and 415.75 is: 623.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.37 : 1,144.07 = 415.75 : x
  2. Step 2: Convert to fraction form
    762.37/1,144.07 = 415.75/x
  3. Step 3: Cross multiply
    762.37x = 1,144.07 × 415.75
  4. Step 4: Simplify right side
    762.37x = 475,647.10
  5. Step 5: Solve for x
    x = 475,647.10/762.37
  6. Step 6: Final answer
    x = 623.91

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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.