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Finding the Fourth Proportional to 422.85, 583.65 and 298.50

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Solution

The fourth proportional to 422.85, 583.65 and 298.50 is: 412.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.85 : 583.65 = 298.50 : x
  2. Step 2: Convert to fraction form
    422.85/583.65 = 298.50/x
  3. Step 3: Cross multiply
    422.85x = 583.65 × 298.50
  4. Step 4: Simplify right side
    422.85x = 174,219.53
  5. Step 5: Solve for x
    x = 174,219.53/422.85
  6. Step 6: Final answer
    x = 412.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.