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Finding the Fourth Proportional to 283.83, 420.72 and 279.47

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Solution

The fourth proportional to 283.83, 420.72 and 279.47 is: 414.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.83 : 420.72 = 279.47 : x
  2. Step 2: Convert to fraction form
    283.83/420.72 = 279.47/x
  3. Step 3: Cross multiply
    283.83x = 420.72 × 279.47
  4. Step 4: Simplify right side
    283.83x = 117,576.51
  5. Step 5: Solve for x
    x = 117,576.51/283.83
  6. Step 6: Final answer
    x = 414.25

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.