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Finding the Fourth Proportional to 779.68, 1,169.89 and 368.32

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Solution

The fourth proportional to 779.68, 1,169.89 and 368.32 is: 552.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.68 : 1,169.89 = 368.32 : x
  2. Step 2: Convert to fraction form
    779.68/1,169.89 = 368.32/x
  3. Step 3: Cross multiply
    779.68x = 1,169.89 × 368.32
  4. Step 4: Simplify right side
    779.68x = 430,897.59
  5. Step 5: Solve for x
    x = 430,897.59/779.68
  6. Step 6: Final answer
    x = 552.66

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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.