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Finding the Fourth Proportional to 883.36, 1,325.40 and 518.32

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Solution

The fourth proportional to 883.36, 1,325.40 and 518.32 is: 777.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.36 : 1,325.40 = 518.32 : x
  2. Step 2: Convert to fraction form
    883.36/1,325.40 = 518.32/x
  3. Step 3: Cross multiply
    883.36x = 1,325.40 × 518.32
  4. Step 4: Simplify right side
    883.36x = 686,981.33
  5. Step 5: Solve for x
    x = 686,981.33/883.36
  6. Step 6: Final answer
    x = 777.69

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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.