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Finding the Fourth Proportional to 292.83, 439.52 and 138.86

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Solution

The fourth proportional to 292.83, 439.52 and 138.86 is: 208.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.83 : 439.52 = 138.86 : x
  2. Step 2: Convert to fraction form
    292.83/439.52 = 138.86/x
  3. Step 3: Cross multiply
    292.83x = 439.52 × 138.86
  4. Step 4: Simplify right side
    292.83x = 61,030.50
  5. Step 5: Solve for x
    x = 61,030.50/292.83
  6. Step 6: Final answer
    x = 208.42

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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.