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Finding the Fourth Proportional to 451.30, 677.06 and 207.99

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Solution

The fourth proportional to 451.30, 677.06 and 207.99 is: 312.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.30 : 677.06 = 207.99 : x
  2. Step 2: Convert to fraction form
    451.30/677.06 = 207.99/x
  3. Step 3: Cross multiply
    451.30x = 677.06 × 207.99
  4. Step 4: Simplify right side
    451.30x = 140,823.35
  5. Step 5: Solve for x
    x = 140,823.35/451.30
  6. Step 6: Final answer
    x = 312.04

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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.