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Finding the Fourth Proportional to 298.80, 412.02 and 210.12

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Solution

The fourth proportional to 298.80, 412.02 and 210.12 is: 289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.80 : 412.02 = 210.12 : x
  2. Step 2: Convert to fraction form
    298.80/412.02 = 210.12/x
  3. Step 3: Cross multiply
    298.80x = 412.02 × 210.12
  4. Step 4: Simplify right side
    298.80x = 86,573.64
  5. Step 5: Solve for x
    x = 86,573.64/298.80
  6. Step 6: Final answer
    x = 289.74

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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.