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Finding the Fourth Proportional to 855.50, 1,283.51 and 368.28

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Solution

The fourth proportional to 855.50, 1,283.51 and 368.28 is: 552.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.50 : 1,283.51 = 368.28 : x
  2. Step 2: Convert to fraction form
    855.50/1,283.51 = 368.28/x
  3. Step 3: Cross multiply
    855.50x = 1,283.51 × 368.28
  4. Step 4: Simplify right side
    855.50x = 472,691.98
  5. Step 5: Solve for x
    x = 472,691.98/855.50
  6. Step 6: Final answer
    x = 552.54

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Double scale
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1.5x scale

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.