Home / 1,440.21-2,160.36-400.22

Finding the Fourth Proportional to 1,440.21, 2,160.36 and 400.22

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Solution

The fourth proportional to 1,440.21, 2,160.36 and 400.22 is: 600.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.21 : 2,160.36 = 400.22 : x
  2. Step 2: Convert to fraction form
    1,440.21/2,160.36 = 400.22/x
  3. Step 3: Cross multiply
    1,440.21x = 2,160.36 × 400.22
  4. Step 4: Simplify right side
    1,440.21x = 864,619.28
  5. Step 5: Solve for x
    x = 864,619.28/1,440.21
  6. Step 6: Final answer
    x = 600.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.