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Finding the Fourth Proportional to 2,074.36, 3,110.02 and 978.11

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Solution

The fourth proportional to 2,074.36, 3,110.02 and 978.11 is: 1,466.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.36 : 3,110.02 = 978.11 : x
  2. Step 2: Convert to fraction form
    2,074.36/3,110.02 = 978.11/x
  3. Step 3: Cross multiply
    2,074.36x = 3,110.02 × 978.11
  4. Step 4: Simplify right side
    2,074.36x = 3,041,941.66
  5. Step 5: Solve for x
    x = 3,041,941.66/2,074.36
  6. Step 6: Final answer
    x = 1,466.45

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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.