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Finding the Fourth Proportional to 855.80, 1,280.96 and 444.37

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Solution

The fourth proportional to 855.80, 1,280.96 and 444.37 is: 665.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.80 : 1,280.96 = 444.37 : x
  2. Step 2: Convert to fraction form
    855.80/1,280.96 = 444.37/x
  3. Step 3: Cross multiply
    855.80x = 1,280.96 × 444.37
  4. Step 4: Simplify right side
    855.80x = 569,220.20
  5. Step 5: Solve for x
    x = 569,220.20/855.80
  6. Step 6: Final answer
    x = 665.13

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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.