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Finding the Fourth Proportional to 855.76, 1,282.83 and 368.50

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Solution

The fourth proportional to 855.76, 1,282.83 and 368.50 is: 552.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.76 : 1,282.83 = 368.50 : x
  2. Step 2: Convert to fraction form
    855.76/1,282.83 = 368.50/x
  3. Step 3: Cross multiply
    855.76x = 1,282.83 × 368.50
  4. Step 4: Simplify right side
    855.76x = 472,722.86
  5. Step 5: Solve for x
    x = 472,722.86/855.76
  6. Step 6: Final answer
    x = 552.40

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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.