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Finding the Fourth Proportional to 3,985.34, 5,978.01 and 1,899.02

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Solution

The fourth proportional to 3,985.34, 5,978.01 and 1,899.02 is: 2,848.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.34 : 5,978.01 = 1,899.02 : x
  2. Step 2: Convert to fraction form
    3,985.34/5,978.01 = 1,899.02/x
  3. Step 3: Cross multiply
    3,985.34x = 5,978.01 × 1,899.02
  4. Step 4: Simplify right side
    3,985.34x = 11,352,330.66
  5. Step 5: Solve for x
    x = 11,352,330.66/3,985.34
  6. Step 6: Final answer
    x = 2,848.53

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Similar ratio
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1.5x scale

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.