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Finding the Fourth Proportional to 2,165.66, 2,985.10 and 1,692.72

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Solution

The fourth proportional to 2,165.66, 2,985.10 and 1,692.72 is: 2,333.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.66 : 2,985.10 = 1,692.72 : x
  2. Step 2: Convert to fraction form
    2,165.66/2,985.10 = 1,692.72/x
  3. Step 3: Cross multiply
    2,165.66x = 2,985.10 × 1,692.72
  4. Step 4: Simplify right side
    2,165.66x = 5,052,938.47
  5. Step 5: Solve for x
    x = 5,052,938.47/2,165.66
  6. Step 6: Final answer
    x = 2,333.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.