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Finding the Fourth Proportional to 505.07, 696.89 and 283.98

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Solution

The fourth proportional to 505.07, 696.89 and 283.98 is: 391.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.07 : 696.89 = 283.98 : x
  2. Step 2: Convert to fraction form
    505.07/696.89 = 283.98/x
  3. Step 3: Cross multiply
    505.07x = 696.89 × 283.98
  4. Step 4: Simplify right side
    505.07x = 197,901.40
  5. Step 5: Solve for x
    x = 197,901.40/505.07
  6. Step 6: Final answer
    x = 391.83

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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.