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Finding the Fourth Proportional to 383.58, 529.56 and 278.56

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Solution

The fourth proportional to 383.58, 529.56 and 278.56 is: 384.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.58 : 529.56 = 278.56 : x
  2. Step 2: Convert to fraction form
    383.58/529.56 = 278.56/x
  3. Step 3: Cross multiply
    383.58x = 529.56 × 278.56
  4. Step 4: Simplify right side
    383.58x = 147,514.23
  5. Step 5: Solve for x
    x = 147,514.23/383.58
  6. Step 6: Final answer
    x = 384.57

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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.