Home / 1,440.32-2,157.60-1,328.48

Finding the Fourth Proportional to 1,440.32, 2,157.60 and 1,328.48

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Solution

The fourth proportional to 1,440.32, 2,157.60 and 1,328.48 is: 1,990.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.32 : 2,157.60 = 1,328.48 : x
  2. Step 2: Convert to fraction form
    1,440.32/2,157.60 = 1,328.48/x
  3. Step 3: Cross multiply
    1,440.32x = 2,157.60 × 1,328.48
  4. Step 4: Simplify right side
    1,440.32x = 2,866,328.45
  5. Step 5: Solve for x
    x = 2,866,328.45/1,440.32
  6. Step 6: Final answer
    x = 1,990.06

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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.