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Finding the Fourth Proportional to 1,178.51, 1,625.73 and 699.69

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Solution

The fourth proportional to 1,178.51, 1,625.73 and 699.69 is: 965.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.51 : 1,625.73 = 699.69 : x
  2. Step 2: Convert to fraction form
    1,178.51/1,625.73 = 699.69/x
  3. Step 3: Cross multiply
    1,178.51x = 1,625.73 × 699.69
  4. Step 4: Simplify right side
    1,178.51x = 1,137,507.02
  5. Step 5: Solve for x
    x = 1,137,507.02/1,178.51
  6. Step 6: Final answer
    x = 965.21

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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.