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Finding the Fourth Proportional to 4,992.99, 7,488.72 and 3,138.44

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Solution

The fourth proportional to 4,992.99, 7,488.72 and 3,138.44 is: 4,707.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992.99 : 7,488.72 = 3,138.44 : x
  2. Step 2: Convert to fraction form
    4,992.99/7,488.72 = 3,138.44/x
  3. Step 3: Cross multiply
    4,992.99x = 7,488.72 × 3,138.44
  4. Step 4: Simplify right side
    4,992.99x = 23,502,898.40
  5. Step 5: Solve for x
    x = 23,502,898.40/4,992.99
  6. Step 6: Final answer
    x = 4,707.18

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1.5x scale

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.