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Finding the Fourth Proportional to 779.28, 1,168.38 and 368.48

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Solution

The fourth proportional to 779.28, 1,168.38 and 368.48 is: 552.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.28 : 1,168.38 = 368.48 : x
  2. Step 2: Convert to fraction form
    779.28/1,168.38 = 368.48/x
  3. Step 3: Cross multiply
    779.28x = 1,168.38 × 368.48
  4. Step 4: Simplify right side
    779.28x = 430,518.82
  5. Step 5: Solve for x
    x = 430,518.82/779.28
  6. Step 6: Final answer
    x = 552.46

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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.