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Finding the Fourth Proportional to 775.79, 1,161.35 and 501.33

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Solution

The fourth proportional to 775.79, 1,161.35 and 501.33 is: 750.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.79 : 1,161.35 = 501.33 : x
  2. Step 2: Convert to fraction form
    775.79/1,161.35 = 501.33/x
  3. Step 3: Cross multiply
    775.79x = 1,161.35 × 501.33
  4. Step 4: Simplify right side
    775.79x = 582,219.60
  5. Step 5: Solve for x
    x = 582,219.60/775.79
  6. Step 6: Final answer
    x = 750.49

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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.