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Finding the Fourth Proportional to 2,670.42, 4,005.60 and 939.02

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Solution

The fourth proportional to 2,670.42, 4,005.60 and 939.02 is: 1,408.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.42 : 4,005.60 = 939.02 : x
  2. Step 2: Convert to fraction form
    2,670.42/4,005.60 = 939.02/x
  3. Step 3: Cross multiply
    2,670.42x = 4,005.60 × 939.02
  4. Step 4: Simplify right side
    2,670.42x = 3,761,338.51
  5. Step 5: Solve for x
    x = 3,761,338.51/2,670.42
  6. Step 6: Final answer
    x = 1,408.52

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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.