Home / 1,984.65-2,738.46-1,145.40

Finding the Fourth Proportional to 1,984.65, 2,738.46 and 1,145.40

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Solution

The fourth proportional to 1,984.65, 2,738.46 and 1,145.40 is: 1,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.65 : 2,738.46 = 1,145.40 : x
  2. Step 2: Convert to fraction form
    1,984.65/2,738.46 = 1,145.40/x
  3. Step 3: Cross multiply
    1,984.65x = 2,738.46 × 1,145.40
  4. Step 4: Simplify right side
    1,984.65x = 3,136,632.08
  5. Step 5: Solve for x
    x = 3,136,632.08/1,984.65
  6. Step 6: Final answer
    x = 1,580.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.