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Finding the Fourth Proportional to 2,011.95, 3,018.87 and 971.91

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Solution

The fourth proportional to 2,011.95, 3,018.87 and 971.91 is: 1,458.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.95 : 3,018.87 = 971.91 : x
  2. Step 2: Convert to fraction form
    2,011.95/3,018.87 = 971.91/x
  3. Step 3: Cross multiply
    2,011.95x = 3,018.87 × 971.91
  4. Step 4: Simplify right side
    2,011.95x = 2,934,069.94
  5. Step 5: Solve for x
    x = 2,934,069.94/2,011.95
  6. Step 6: Final answer
    x = 1,458.32

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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.