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Finding the Fourth Proportional to 855.77, 1,283.85 and 368.55

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Solution

The fourth proportional to 855.77, 1,283.85 and 368.55 is: 552.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.77 : 1,283.85 = 368.55 : x
  2. Step 2: Convert to fraction form
    855.77/1,283.85 = 368.55/x
  3. Step 3: Cross multiply
    855.77x = 1,283.85 × 368.55
  4. Step 4: Simplify right side
    855.77x = 473,162.92
  5. Step 5: Solve for x
    x = 473,162.92/855.77
  6. Step 6: Final answer
    x = 552.91

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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.