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Finding the Fourth Proportional to 855.51, 1,282.38 and 368.16

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Solution

The fourth proportional to 855.51, 1,282.38 and 368.16 is: 551.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.51 : 1,282.38 = 368.16 : x
  2. Step 2: Convert to fraction form
    855.51/1,282.38 = 368.16/x
  3. Step 3: Cross multiply
    855.51x = 1,282.38 × 368.16
  4. Step 4: Simplify right side
    855.51x = 472,121.02
  5. Step 5: Solve for x
    x = 472,121.02/855.51
  6. Step 6: Final answer
    x = 551.86

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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.