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Finding the Fourth Proportional to 2,276.67, 3,416.63 and 978.51

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Solution

The fourth proportional to 2,276.67, 3,416.63 and 978.51 is: 1,468.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,276.67 : 3,416.63 = 978.51 : x
  2. Step 2: Convert to fraction form
    2,276.67/3,416.63 = 978.51/x
  3. Step 3: Cross multiply
    2,276.67x = 3,416.63 × 978.51
  4. Step 4: Simplify right side
    2,276.67x = 3,343,201.73
  5. Step 5: Solve for x
    x = 3,343,201.73/2,276.67
  6. Step 6: Final answer
    x = 1,468.46

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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.