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Finding the Fourth Proportional to 5,475.64, 8,211.96 and 1,965

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Solution

The fourth proportional to 5,475.64, 8,211.96 and 1,965 is: 2,946.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,475.64 : 8,211.96 = 1,965 : x
  2. Step 2: Convert to fraction form
    5,475.64/8,211.96 = 1,965/x
  3. Step 3: Cross multiply
    5,475.64x = 8,211.96 × 1,965
  4. Step 4: Simplify right side
    5,475.64x = 16,136,501.40
  5. Step 5: Solve for x
    x = 16,136,501.40/5,475.64
  6. Step 6: Final answer
    x = 2,946.96

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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.