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Finding the Fourth Proportional to 1,692.64, 2,535.81 and 911.53

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Solution

The fourth proportional to 1,692.64, 2,535.81 and 911.53 is: 1,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.64 : 2,535.81 = 911.53 : x
  2. Step 2: Convert to fraction form
    1,692.64/2,535.81 = 911.53/x
  3. Step 3: Cross multiply
    1,692.64x = 2,535.81 × 911.53
  4. Step 4: Simplify right side
    1,692.64x = 2,311,466.89
  5. Step 5: Solve for x
    x = 2,311,466.89/1,692.64
  6. Step 6: Final answer
    x = 1,365.60

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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.