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Finding the Fourth Proportional to 316.90, 437.52 and 283.64

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Solution

The fourth proportional to 316.90, 437.52 and 283.64 is: 391.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.90 : 437.52 = 283.64 : x
  2. Step 2: Convert to fraction form
    316.90/437.52 = 283.64/x
  3. Step 3: Cross multiply
    316.90x = 437.52 × 283.64
  4. Step 4: Simplify right side
    316.90x = 124,100.52
  5. Step 5: Solve for x
    x = 124,100.52/316.90
  6. Step 6: Final answer
    x = 391.61

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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.