Home / 3,055.05-4,213.20-2,159.40

Finding the Fourth Proportional to 3,055.05, 4,213.20 and 2,159.40

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Solution

The fourth proportional to 3,055.05, 4,213.20 and 2,159.40 is: 2,978.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,055.05 : 4,213.20 = 2,159.40 : x
  2. Step 2: Convert to fraction form
    3,055.05/4,213.20 = 2,159.40/x
  3. Step 3: Cross multiply
    3,055.05x = 4,213.20 × 2,159.40
  4. Step 4: Simplify right side
    3,055.05x = 9,097,984.08
  5. Step 5: Solve for x
    x = 9,097,984.08/3,055.05
  6. Step 6: Final answer
    x = 2,978.01

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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.