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Finding the Fourth Proportional to 883.23, 1,218.78 and 529.15

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Solution

The fourth proportional to 883.23, 1,218.78 and 529.15 is: 730.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.23 : 1,218.78 = 529.15 : x
  2. Step 2: Convert to fraction form
    883.23/1,218.78 = 529.15/x
  3. Step 3: Cross multiply
    883.23x = 1,218.78 × 529.15
  4. Step 4: Simplify right side
    883.23x = 644,916.68
  5. Step 5: Solve for x
    x = 644,916.68/883.23
  6. Step 6: Final answer
    x = 730.18

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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.