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Finding the Fourth Proportional to 455.61, 683.48 and 239.20

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Solution

The fourth proportional to 455.61, 683.48 and 239.20 is: 358.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.61 : 683.48 = 239.20 : x
  2. Step 2: Convert to fraction form
    455.61/683.48 = 239.20/x
  3. Step 3: Cross multiply
    455.61x = 683.48 × 239.20
  4. Step 4: Simplify right side
    455.61x = 163,487.22
  5. Step 5: Solve for x
    x = 163,487.22/455.61
  6. Step 6: Final answer
    x = 358.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.