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Finding the Fourth Proportional to 855.56, 1,283.10 and 335.40

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Solution

The fourth proportional to 855.56, 1,283.10 and 335.40 is: 503.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.56 : 1,283.10 = 335.40 : x
  2. Step 2: Convert to fraction form
    855.56/1,283.10 = 335.40/x
  3. Step 3: Cross multiply
    855.56x = 1,283.10 × 335.40
  4. Step 4: Simplify right side
    855.56x = 430,351.74
  5. Step 5: Solve for x
    x = 430,351.74/855.56
  6. Step 6: Final answer
    x = 503.01

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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.