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Finding the Fourth Proportional to 352.98, 487.50 and 280.08

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Solution

The fourth proportional to 352.98, 487.50 and 280.08 is: 386.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.98 : 487.50 = 280.08 : x
  2. Step 2: Convert to fraction form
    352.98/487.50 = 280.08/x
  3. Step 3: Cross multiply
    352.98x = 487.50 × 280.08
  4. Step 4: Simplify right side
    352.98x = 136,539
  5. Step 5: Solve for x
    x = 136,539/352.98
  6. Step 6: Final answer
    x = 386.82

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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.