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Finding the Fourth Proportional to 297.60, 410.73 and 280.02

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Solution

The fourth proportional to 297.60, 410.73 and 280.02 is: 386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.60 : 410.73 = 280.02 : x
  2. Step 2: Convert to fraction form
    297.60/410.73 = 280.02/x
  3. Step 3: Cross multiply
    297.60x = 410.73 × 280.02
  4. Step 4: Simplify right side
    297.60x = 115,012.61
  5. Step 5: Solve for x
    x = 115,012.61/297.60
  6. Step 6: Final answer
    x = 386.47

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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.