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Finding the Fourth Proportional to 358.02, 494.31 and 274.98

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Solution

The fourth proportional to 358.02, 494.31 and 274.98 is: 379.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.02 : 494.31 = 274.98 : x
  2. Step 2: Convert to fraction form
    358.02/494.31 = 274.98/x
  3. Step 3: Cross multiply
    358.02x = 494.31 × 274.98
  4. Step 4: Simplify right side
    358.02x = 135,925.36
  5. Step 5: Solve for x
    x = 135,925.36/358.02
  6. Step 6: Final answer
    x = 379.66

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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.