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Finding the Fourth Proportional to 578.56, 798.48 and 345.64

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Solution

The fourth proportional to 578.56, 798.48 and 345.64 is: 477.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.56 : 798.48 = 345.64 : x
  2. Step 2: Convert to fraction form
    578.56/798.48 = 345.64/x
  3. Step 3: Cross multiply
    578.56x = 798.48 × 345.64
  4. Step 4: Simplify right side
    578.56x = 275,986.63
  5. Step 5: Solve for x
    x = 275,986.63/578.56
  6. Step 6: Final answer
    x = 477.02

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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.