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Finding the Fourth Proportional to 1,899.21, 2,850.10 and 666.63

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Solution

The fourth proportional to 1,899.21, 2,850.10 and 666.63 is: 1,000.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.21 : 2,850.10 = 666.63 : x
  2. Step 2: Convert to fraction form
    1,899.21/2,850.10 = 666.63/x
  3. Step 3: Cross multiply
    1,899.21x = 2,850.10 × 666.63
  4. Step 4: Simplify right side
    1,899.21x = 1,899,962.16
  5. Step 5: Solve for x
    x = 1,899,962.16/1,899.21
  6. Step 6: Final answer
    x = 1,000.40

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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.