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Finding the Fourth Proportional to 283.26, 390.36 and 259.98

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Solution

The fourth proportional to 283.26, 390.36 and 259.98 is: 358.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.26 : 390.36 = 259.98 : x
  2. Step 2: Convert to fraction form
    283.26/390.36 = 259.98/x
  3. Step 3: Cross multiply
    283.26x = 390.36 × 259.98
  4. Step 4: Simplify right side
    283.26x = 101,485.79
  5. Step 5: Solve for x
    x = 101,485.79/283.26
  6. Step 6: Final answer
    x = 358.28

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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.