Home / 3,480.40-4,802.60-1,988.28

Finding the Fourth Proportional to 3,480.40, 4,802.60 and 1,988.28

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Solution

The fourth proportional to 3,480.40, 4,802.60 and 1,988.28 is: 2,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.40 : 4,802.60 = 1,988.28 : x
  2. Step 2: Convert to fraction form
    3,480.40/4,802.60 = 1,988.28/x
  3. Step 3: Cross multiply
    3,480.40x = 4,802.60 × 1,988.28
  4. Step 4: Simplify right side
    3,480.40x = 9,548,913.53
  5. Step 5: Solve for x
    x = 9,548,913.53/3,480.40
  6. Step 6: Final answer
    x = 2,743.63

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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.