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Finding the Fourth Proportional to 1,664.45, 2,493.60 and 971.45

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Solution

The fourth proportional to 1,664.45, 2,493.60 and 971.45 is: 1,455.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.45 : 2,493.60 = 971.45 : x
  2. Step 2: Convert to fraction form
    1,664.45/2,493.60 = 971.45/x
  3. Step 3: Cross multiply
    1,664.45x = 2,493.60 × 971.45
  4. Step 4: Simplify right side
    1,664.45x = 2,422,407.72
  5. Step 5: Solve for x
    x = 2,422,407.72/1,664.45
  6. Step 6: Final answer
    x = 1,455.38

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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.