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Finding the Fourth Proportional to 354.08, 488.43 and 260.66

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Solution

The fourth proportional to 354.08, 488.43 and 260.66 is: 359.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.08 : 488.43 = 260.66 : x
  2. Step 2: Convert to fraction form
    354.08/488.43 = 260.66/x
  3. Step 3: Cross multiply
    354.08x = 488.43 × 260.66
  4. Step 4: Simplify right side
    354.08x = 127,315.38
  5. Step 5: Solve for x
    x = 127,315.38/354.08
  6. Step 6: Final answer
    x = 359.56

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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.