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Finding the Fourth Proportional to 1,898.16, 2,847.26 and 665.60

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Solution

The fourth proportional to 1,898.16, 2,847.26 and 665.60 is: 998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.16 : 2,847.26 = 665.60 : x
  2. Step 2: Convert to fraction form
    1,898.16/2,847.26 = 665.60/x
  3. Step 3: Cross multiply
    1,898.16x = 2,847.26 × 665.60
  4. Step 4: Simplify right side
    1,898.16x = 1,895,125.81
  5. Step 5: Solve for x
    x = 1,895,125.81/1,898.16
  6. Step 6: Final answer
    x = 998.40

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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.