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Finding the Fourth Proportional to 578.56, 798.30 and 345.76

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Solution

The fourth proportional to 578.56, 798.30 and 345.76 is: 477.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.56 : 798.30 = 345.76 : x
  2. Step 2: Convert to fraction form
    578.56/798.30 = 345.76/x
  3. Step 3: Cross multiply
    578.56x = 798.30 × 345.76
  4. Step 4: Simplify right side
    578.56x = 276,020.21
  5. Step 5: Solve for x
    x = 276,020.21/578.56
  6. Step 6: Final answer
    x = 477.08

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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.