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Finding the Fourth Proportional to 645.83, 967.87 and 298.40

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Solution

The fourth proportional to 645.83, 967.87 and 298.40 is: 447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.83 : 967.87 = 298.40 : x
  2. Step 2: Convert to fraction form
    645.83/967.87 = 298.40/x
  3. Step 3: Cross multiply
    645.83x = 967.87 × 298.40
  4. Step 4: Simplify right side
    645.83x = 288,812.41
  5. Step 5: Solve for x
    x = 288,812.41/645.83
  6. Step 6: Final answer
    x = 447.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.