Home / 3,120.86-4,681.20-1,271.52

Finding the Fourth Proportional to 3,120.86, 4,681.20 and 1,271.52

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Solution

The fourth proportional to 3,120.86, 4,681.20 and 1,271.52 is: 1,907.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.86 : 4,681.20 = 1,271.52 : x
  2. Step 2: Convert to fraction form
    3,120.86/4,681.20 = 1,271.52/x
  3. Step 3: Cross multiply
    3,120.86x = 4,681.20 × 1,271.52
  4. Step 4: Simplify right side
    3,120.86x = 5,952,244.19
  5. Step 5: Solve for x
    x = 5,952,244.19/3,120.86
  6. Step 6: Final answer
    x = 1,907.24

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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.