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Finding the Fourth Proportional to 383.36, 528.70 and 339.14

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Solution

The fourth proportional to 383.36, 528.70 and 339.14 is: 467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.36 : 528.70 = 339.14 : x
  2. Step 2: Convert to fraction form
    383.36/528.70 = 339.14/x
  3. Step 3: Cross multiply
    383.36x = 528.70 × 339.14
  4. Step 4: Simplify right side
    383.36x = 179,303.32
  5. Step 5: Solve for x
    x = 179,303.32/383.36
  6. Step 6: Final answer
    x = 467.72

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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.