Home / 1,981.60-2,983.96-1,820.32

Finding the Fourth Proportional to 1,981.60, 2,983.96 and 1,820.32

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Solution

The fourth proportional to 1,981.60, 2,983.96 and 1,820.32 is: 2,741.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.60 : 2,983.96 = 1,820.32 : x
  2. Step 2: Convert to fraction form
    1,981.60/2,983.96 = 1,820.32/x
  3. Step 3: Cross multiply
    1,981.60x = 2,983.96 × 1,820.32
  4. Step 4: Simplify right side
    1,981.60x = 5,431,762.07
  5. Step 5: Solve for x
    x = 5,431,762.07/1,981.60
  6. Step 6: Final answer
    x = 2,741.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.