Home / 3,120.74-4,681.02-1,271.40

Finding the Fourth Proportional to 3,120.74, 4,681.02 and 1,271.40

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Solution

The fourth proportional to 3,120.74, 4,681.02 and 1,271.40 is: 1,907.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.74 : 4,681.02 = 1,271.40 : x
  2. Step 2: Convert to fraction form
    3,120.74/4,681.02 = 1,271.40/x
  3. Step 3: Cross multiply
    3,120.74x = 4,681.02 × 1,271.40
  4. Step 4: Simplify right side
    3,120.74x = 5,951,448.83
  5. Step 5: Solve for x
    x = 5,951,448.83/3,120.74
  6. Step 6: Final answer
    x = 1,907.06

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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.