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Finding the Fourth Proportional to 1,939.03, 2,905.80 and 899.35

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Solution

The fourth proportional to 1,939.03, 2,905.80 and 899.35 is: 1,347.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.03 : 2,905.80 = 899.35 : x
  2. Step 2: Convert to fraction form
    1,939.03/2,905.80 = 899.35/x
  3. Step 3: Cross multiply
    1,939.03x = 2,905.80 × 899.35
  4. Step 4: Simplify right side
    1,939.03x = 2,613,331.23
  5. Step 5: Solve for x
    x = 2,613,331.23/1,939.03
  6. Step 6: Final answer
    x = 1,347.75

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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.