Home / 3,390.31-4,678.73-2,270.08

Finding the Fourth Proportional to 3,390.31, 4,678.73 and 2,270.08

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Solution

The fourth proportional to 3,390.31, 4,678.73 and 2,270.08 is: 3,132.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.31 : 4,678.73 = 2,270.08 : x
  2. Step 2: Convert to fraction form
    3,390.31/4,678.73 = 2,270.08/x
  3. Step 3: Cross multiply
    3,390.31x = 4,678.73 × 2,270.08
  4. Step 4: Simplify right side
    3,390.31x = 10,621,091.40
  5. Step 5: Solve for x
    x = 10,621,091.40/3,390.31
  6. Step 6: Final answer
    x = 3,132.78

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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.