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Finding the Fourth Proportional to 855.02, 1,282.56 and 718.94

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Solution

The fourth proportional to 855.02, 1,282.56 and 718.94 is: 1,078.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.02 : 1,282.56 = 718.94 : x
  2. Step 2: Convert to fraction form
    855.02/1,282.56 = 718.94/x
  3. Step 3: Cross multiply
    855.02x = 1,282.56 × 718.94
  4. Step 4: Simplify right side
    855.02x = 922,083.69
  5. Step 5: Solve for x
    x = 922,083.69/855.02
  6. Step 6: Final answer
    x = 1,078.44

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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.