Home / 1,385.90-2,080.67-1,271.29

Finding the Fourth Proportional to 1,385.90, 2,080.67 and 1,271.29

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Solution

The fourth proportional to 1,385.90, 2,080.67 and 1,271.29 is: 1,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.90 : 2,080.67 = 1,271.29 : x
  2. Step 2: Convert to fraction form
    1,385.90/2,080.67 = 1,271.29/x
  3. Step 3: Cross multiply
    1,385.90x = 2,080.67 × 1,271.29
  4. Step 4: Simplify right side
    1,385.90x = 2,645,132.94
  5. Step 5: Solve for x
    x = 2,645,132.94/1,385.90
  6. Step 6: Final answer
    x = 1,908.60

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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.