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Finding the Fourth Proportional to 762.42, 1,144.23 and 609.72

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Solution

The fourth proportional to 762.42, 1,144.23 and 609.72 is: 915.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.42 : 1,144.23 = 609.72 : x
  2. Step 2: Convert to fraction form
    762.42/1,144.23 = 609.72/x
  3. Step 3: Cross multiply
    762.42x = 1,144.23 × 609.72
  4. Step 4: Simplify right side
    762.42x = 697,659.92
  5. Step 5: Solve for x
    x = 697,659.92/762.42
  6. Step 6: Final answer
    x = 915.06

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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.