Home / 3,270-4,903.40-1,320.72

Finding the Fourth Proportional to 3,270, 4,903.40 and 1,320.72

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Solution

The fourth proportional to 3,270, 4,903.40 and 1,320.72 is: 1,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,270 : 4,903.40 = 1,320.72 : x
  2. Step 2: Convert to fraction form
    3,270/4,903.40 = 1,320.72/x
  3. Step 3: Cross multiply
    3,270x = 4,903.40 × 1,320.72
  4. Step 4: Simplify right side
    3,270x = 6,476,018.45
  5. Step 5: Solve for x
    x = 6,476,018.45/3,270
  6. Step 6: Final answer
    x = 1,980.43

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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.