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Finding the Fourth Proportional to 1,285.42, 1,928.26 and 360.99

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Solution

The fourth proportional to 1,285.42, 1,928.26 and 360.99 is: 541.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.42 : 1,928.26 = 360.99 : x
  2. Step 2: Convert to fraction form
    1,285.42/1,928.26 = 360.99/x
  3. Step 3: Cross multiply
    1,285.42x = 1,928.26 × 360.99
  4. Step 4: Simplify right side
    1,285.42x = 696,081.00
  5. Step 5: Solve for x
    x = 696,081.00/1,285.42
  6. Step 6: Final answer
    x = 541.52

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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.