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Finding the Fourth Proportional to 385.51, 578.46 and 294.79

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Solution

The fourth proportional to 385.51, 578.46 and 294.79 is: 442.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.51 : 578.46 = 294.79 : x
  2. Step 2: Convert to fraction form
    385.51/578.46 = 294.79/x
  3. Step 3: Cross multiply
    385.51x = 578.46 × 294.79
  4. Step 4: Simplify right side
    385.51x = 170,521.33
  5. Step 5: Solve for x
    x = 170,521.33/385.51
  6. Step 6: Final answer
    x = 442.33

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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.