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Finding the Fourth Proportional to 883.78, 1,325.06 and 722.18

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Solution

The fourth proportional to 883.78, 1,325.06 and 722.18 is: 1,082.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.78 : 1,325.06 = 722.18 : x
  2. Step 2: Convert to fraction form
    883.78/1,325.06 = 722.18/x
  3. Step 3: Cross multiply
    883.78x = 1,325.06 × 722.18
  4. Step 4: Simplify right side
    883.78x = 956,934.24
  5. Step 5: Solve for x
    x = 956,934.24/883.78
  6. Step 6: Final answer
    x = 1,082.78

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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.