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Finding the Fourth Proportional to 888.57, 1,331.37 and 786.51

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Solution

The fourth proportional to 888.57, 1,331.37 and 786.51 is: 1,178.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.57 : 1,331.37 = 786.51 : x
  2. Step 2: Convert to fraction form
    888.57/1,331.37 = 786.51/x
  3. Step 3: Cross multiply
    888.57x = 1,331.37 × 786.51
  4. Step 4: Simplify right side
    888.57x = 1,047,135.82
  5. Step 5: Solve for x
    x = 1,047,135.82/888.57
  6. Step 6: Final answer
    x = 1,178.45

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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.