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Finding the Fourth Proportional to 762.37, 1,143.55 and 438.37

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Solution

The fourth proportional to 762.37, 1,143.55 and 438.37 is: 657.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.37 : 1,143.55 = 438.37 : x
  2. Step 2: Convert to fraction form
    762.37/1,143.55 = 438.37/x
  3. Step 3: Cross multiply
    762.37x = 1,143.55 × 438.37
  4. Step 4: Simplify right side
    762.37x = 501,292.30
  5. Step 5: Solve for x
    x = 501,292.30/762.37
  6. Step 6: Final answer
    x = 657.55

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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.