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Finding the Fourth Proportional to 484.60, 668.75 and 274.81

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Solution

The fourth proportional to 484.60, 668.75 and 274.81 is: 379.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.60 : 668.75 = 274.81 : x
  2. Step 2: Convert to fraction form
    484.60/668.75 = 274.81/x
  3. Step 3: Cross multiply
    484.60x = 668.75 × 274.81
  4. Step 4: Simplify right side
    484.60x = 183,779.19
  5. Step 5: Solve for x
    x = 183,779.19/484.60
  6. Step 6: Final answer
    x = 379.24

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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.