Home / 2,164.36-2,987.32-1,378.30

Finding the Fourth Proportional to 2,164.36, 2,987.32 and 1,378.30

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Solution

The fourth proportional to 2,164.36, 2,987.32 and 1,378.30 is: 1,902.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.36 : 2,987.32 = 1,378.30 : x
  2. Step 2: Convert to fraction form
    2,164.36/2,987.32 = 1,378.30/x
  3. Step 3: Cross multiply
    2,164.36x = 2,987.32 × 1,378.30
  4. Step 4: Simplify right side
    2,164.36x = 4,117,423.16
  5. Step 5: Solve for x
    x = 4,117,423.16/2,164.36
  6. Step 6: Final answer
    x = 1,902.37

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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.