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Finding the Fourth Proportional to 864.18, 1,193.31 and 569.34

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Solution

The fourth proportional to 864.18, 1,193.31 and 569.34 is: 786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.18 : 1,193.31 = 569.34 : x
  2. Step 2: Convert to fraction form
    864.18/1,193.31 = 569.34/x
  3. Step 3: Cross multiply
    864.18x = 1,193.31 × 569.34
  4. Step 4: Simplify right side
    864.18x = 679,399.12
  5. Step 5: Solve for x
    x = 679,399.12/864.18
  6. Step 6: Final answer
    x = 786.18

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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.