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Finding the Fourth Proportional to 383.18, 529.21 and 266.54

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Solution

The fourth proportional to 383.18, 529.21 and 266.54 is: 368.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.18 : 529.21 = 266.54 : x
  2. Step 2: Convert to fraction form
    383.18/529.21 = 266.54/x
  3. Step 3: Cross multiply
    383.18x = 529.21 × 266.54
  4. Step 4: Simplify right side
    383.18x = 141,055.63
  5. Step 5: Solve for x
    x = 141,055.63/383.18
  6. Step 6: Final answer
    x = 368.12

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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.