Home / 1,540.90-2,312.70-1,322.20

Finding the Fourth Proportional to 1,540.90, 2,312.70 and 1,322.20

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Solution

The fourth proportional to 1,540.90, 2,312.70 and 1,322.20 is: 1,984.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.90 : 2,312.70 = 1,322.20 : x
  2. Step 2: Convert to fraction form
    1,540.90/2,312.70 = 1,322.20/x
  3. Step 3: Cross multiply
    1,540.90x = 2,312.70 × 1,322.20
  4. Step 4: Simplify right side
    1,540.90x = 3,057,851.94
  5. Step 5: Solve for x
    x = 3,057,851.94/1,540.90
  6. Step 6: Final answer
    x = 1,984.46

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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.