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Finding the Fourth Proportional to 354.68, 528.56 and 343.08

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Solution

The fourth proportional to 354.68, 528.56 and 343.08 is: 511.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.68 : 528.56 = 343.08 : x
  2. Step 2: Convert to fraction form
    354.68/528.56 = 343.08/x
  3. Step 3: Cross multiply
    354.68x = 528.56 × 343.08
  4. Step 4: Simplify right side
    354.68x = 181,338.36
  5. Step 5: Solve for x
    x = 181,338.36/354.68
  6. Step 6: Final answer
    x = 511.27

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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.