Home / 3,978.36-5,490.31-2,210.13

Finding the Fourth Proportional to 3,978.36, 5,490.31 and 2,210.13

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Solution

The fourth proportional to 3,978.36, 5,490.31 and 2,210.13 is: 3,050.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.36 : 5,490.31 = 2,210.13 : x
  2. Step 2: Convert to fraction form
    3,978.36/5,490.31 = 2,210.13/x
  3. Step 3: Cross multiply
    3,978.36x = 5,490.31 × 2,210.13
  4. Step 4: Simplify right side
    3,978.36x = 12,134,298.84
  5. Step 5: Solve for x
    x = 12,134,298.84/3,978.36
  6. Step 6: Final answer
    x = 3,050.08

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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.