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Finding the Fourth Proportional to 1,977.21, 2,968.55 and 1,004

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Solution

The fourth proportional to 1,977.21, 2,968.55 and 1,004 is: 1,507.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.21 : 2,968.55 = 1,004 : x
  2. Step 2: Convert to fraction form
    1,977.21/2,968.55 = 1,004/x
  3. Step 3: Cross multiply
    1,977.21x = 2,968.55 × 1,004
  4. Step 4: Simplify right side
    1,977.21x = 2,980,424.20
  5. Step 5: Solve for x
    x = 2,980,424.20/1,977.21
  6. Step 6: Final answer
    x = 1,507.39

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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.