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Finding the Fourth Proportional to 3,012.61, 4,518.93 and 1,979.17

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Solution

The fourth proportional to 3,012.61, 4,518.93 and 1,979.17 is: 2,968.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.61 : 4,518.93 = 1,979.17 : x
  2. Step 2: Convert to fraction form
    3,012.61/4,518.93 = 1,979.17/x
  3. Step 3: Cross multiply
    3,012.61x = 4,518.93 × 1,979.17
  4. Step 4: Simplify right side
    3,012.61x = 8,943,730.69
  5. Step 5: Solve for x
    x = 8,943,730.69/3,012.61
  6. Step 6: Final answer
    x = 2,968.76

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Similar ratio
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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.