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Finding the Fourth Proportional to 578.95, 798.83 and 346.21

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Solution

The fourth proportional to 578.95, 798.83 and 346.21 is: 477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.95 : 798.83 = 346.21 : x
  2. Step 2: Convert to fraction form
    578.95/798.83 = 346.21/x
  3. Step 3: Cross multiply
    578.95x = 798.83 × 346.21
  4. Step 4: Simplify right side
    578.95x = 276,560.50
  5. Step 5: Solve for x
    x = 276,560.50/578.95
  6. Step 6: Final answer
    x = 477.70

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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.