Home / 1,440.30-2,160.45-400.25

Finding the Fourth Proportional to 1,440.30, 2,160.45 and 400.25

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Solution

The fourth proportional to 1,440.30, 2,160.45 and 400.25 is: 600.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.30 : 2,160.45 = 400.25 : x
  2. Step 2: Convert to fraction form
    1,440.30/2,160.45 = 400.25/x
  3. Step 3: Cross multiply
    1,440.30x = 2,160.45 × 400.25
  4. Step 4: Simplify right side
    1,440.30x = 864,709.31
  5. Step 5: Solve for x
    x = 864,709.31/1,440.30
  6. Step 6: Final answer
    x = 600.37

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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.