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Finding the Fourth Proportional to 883.84, 1,218.96 and 767.20

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Solution

The fourth proportional to 883.84, 1,218.96 and 767.20 is: 1,058.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.84 : 1,218.96 = 767.20 : x
  2. Step 2: Convert to fraction form
    883.84/1,218.96 = 767.20/x
  3. Step 3: Cross multiply
    883.84x = 1,218.96 × 767.20
  4. Step 4: Simplify right side
    883.84x = 935,186.11
  5. Step 5: Solve for x
    x = 935,186.11/883.84
  6. Step 6: Final answer
    x = 1,058.09

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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.