Home / 1,615.16-2,229.99-1,440.20

Finding the Fourth Proportional to 1,615.16, 2,229.99 and 1,440.20

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Solution

The fourth proportional to 1,615.16, 2,229.99 and 1,440.20 is: 1,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.16 : 2,229.99 = 1,440.20 : x
  2. Step 2: Convert to fraction form
    1,615.16/2,229.99 = 1,440.20/x
  3. Step 3: Cross multiply
    1,615.16x = 2,229.99 × 1,440.20
  4. Step 4: Simplify right side
    1,615.16x = 3,211,631.60
  5. Step 5: Solve for x
    x = 3,211,631.60/1,615.16
  6. Step 6: Final answer
    x = 1,988.43

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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.