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Finding the Fourth Proportional to 354.63, 529.27 and 345.39

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Solution

The fourth proportional to 354.63, 529.27 and 345.39 is: 515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.63 : 529.27 = 345.39 : x
  2. Step 2: Convert to fraction form
    354.63/529.27 = 345.39/x
  3. Step 3: Cross multiply
    354.63x = 529.27 × 345.39
  4. Step 4: Simplify right side
    354.63x = 182,804.57
  5. Step 5: Solve for x
    x = 182,804.57/354.63
  6. Step 6: Final answer
    x = 515.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.