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Finding the Fourth Proportional to 183.60, 276.47 and 172.80

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Solution

The fourth proportional to 183.60, 276.47 and 172.80 is: 260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.60 : 276.47 = 172.80 : x
  2. Step 2: Convert to fraction form
    183.60/276.47 = 172.80/x
  3. Step 3: Cross multiply
    183.60x = 276.47 × 172.80
  4. Step 4: Simplify right side
    183.60x = 47,774.02
  5. Step 5: Solve for x
    x = 47,774.02/183.60
  6. Step 6: Final answer
    x = 260.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.