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Finding the Fourth Proportional to 559.94, 838.40 and 286.16

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Solution

The fourth proportional to 559.94, 838.40 and 286.16 is: 428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.94 : 838.40 = 286.16 : x
  2. Step 2: Convert to fraction form
    559.94/838.40 = 286.16/x
  3. Step 3: Cross multiply
    559.94x = 838.40 × 286.16
  4. Step 4: Simplify right side
    559.94x = 239,916.54
  5. Step 5: Solve for x
    x = 239,916.54/559.94
  6. Step 6: Final answer
    x = 428.47

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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.