Home / 1,638.02-2,259.96-939.26

Finding the Fourth Proportional to 1,638.02, 2,259.96 and 939.26

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Solution

The fourth proportional to 1,638.02, 2,259.96 and 939.26 is: 1,295.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.02 : 2,259.96 = 939.26 : x
  2. Step 2: Convert to fraction form
    1,638.02/2,259.96 = 939.26/x
  3. Step 3: Cross multiply
    1,638.02x = 2,259.96 × 939.26
  4. Step 4: Simplify right side
    1,638.02x = 2,122,690.03
  5. Step 5: Solve for x
    x = 2,122,690.03/1,638.02
  6. Step 6: Final answer
    x = 1,295.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.