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Finding the Fourth Proportional to 4,451.07, 6,678.20 and 1,985.67

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Solution

The fourth proportional to 4,451.07, 6,678.20 and 1,985.67 is: 2,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,451.07 : 6,678.20 = 1,985.67 : x
  2. Step 2: Convert to fraction form
    4,451.07/6,678.20 = 1,985.67/x
  3. Step 3: Cross multiply
    4,451.07x = 6,678.20 × 1,985.67
  4. Step 4: Simplify right side
    4,451.07x = 13,260,691.47
  5. Step 5: Solve for x
    x = 13,260,691.47/4,451.07
  6. Step 6: Final answer
    x = 2,979.21

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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.