Home / 3,120.89-4,681.98-1,272.02

Finding the Fourth Proportional to 3,120.89, 4,681.98 and 1,272.02

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Solution

The fourth proportional to 3,120.89, 4,681.98 and 1,272.02 is: 1,908.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.89 : 4,681.98 = 1,272.02 : x
  2. Step 2: Convert to fraction form
    3,120.89/4,681.98 = 1,272.02/x
  3. Step 3: Cross multiply
    3,120.89x = 4,681.98 × 1,272.02
  4. Step 4: Simplify right side
    3,120.89x = 5,955,548.79
  5. Step 5: Solve for x
    x = 5,955,548.79/3,120.89
  6. Step 6: Final answer
    x = 1,908.28

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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.