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Finding the Fourth Proportional to 283.08, 390.38 and 172.52

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Solution

The fourth proportional to 283.08, 390.38 and 172.52 is: 237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.08 : 390.38 = 172.52 : x
  2. Step 2: Convert to fraction form
    283.08/390.38 = 172.52/x
  3. Step 3: Cross multiply
    283.08x = 390.38 × 172.52
  4. Step 4: Simplify right side
    283.08x = 67,348.36
  5. Step 5: Solve for x
    x = 67,348.36/283.08
  6. Step 6: Final answer
    x = 237.91

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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.