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Finding the Fourth Proportional to 777.04, 1,164.72 and 387.33

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Solution

The fourth proportional to 777.04, 1,164.72 and 387.33 is: 580.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.04 : 1,164.72 = 387.33 : x
  2. Step 2: Convert to fraction form
    777.04/1,164.72 = 387.33/x
  3. Step 3: Cross multiply
    777.04x = 1,164.72 × 387.33
  4. Step 4: Simplify right side
    777.04x = 451,129.55
  5. Step 5: Solve for x
    x = 451,129.55/777.04
  6. Step 6: Final answer
    x = 580.57

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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.