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Finding the Fourth Proportional to 777.62, 1,072.93 and 441.53

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Solution

The fourth proportional to 777.62, 1,072.93 and 441.53 is: 609.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.62 : 1,072.93 = 441.53 : x
  2. Step 2: Convert to fraction form
    777.62/1,072.93 = 441.53/x
  3. Step 3: Cross multiply
    777.62x = 1,072.93 × 441.53
  4. Step 4: Simplify right side
    777.62x = 473,735.20
  5. Step 5: Solve for x
    x = 473,735.20/777.62
  6. Step 6: Final answer
    x = 609.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.