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Finding the Fourth Proportional to 283.46, 423.15 and 247

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Solution

The fourth proportional to 283.46, 423.15 and 247 is: 368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.46 : 423.15 = 247 : x
  2. Step 2: Convert to fraction form
    283.46/423.15 = 247/x
  3. Step 3: Cross multiply
    283.46x = 423.15 × 247
  4. Step 4: Simplify right side
    283.46x = 104,518.05
  5. Step 5: Solve for x
    x = 104,518.05/283.46
  6. Step 6: Final answer
    x = 368.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.