Home / 2,157.08-2,976.56-1,212.65

Finding the Fourth Proportional to 2,157.08, 2,976.56 and 1,212.65

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Solution

The fourth proportional to 2,157.08, 2,976.56 and 1,212.65 is: 1,673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.08 : 2,976.56 = 1,212.65 : x
  2. Step 2: Convert to fraction form
    2,157.08/2,976.56 = 1,212.65/x
  3. Step 3: Cross multiply
    2,157.08x = 2,976.56 × 1,212.65
  4. Step 4: Simplify right side
    2,157.08x = 3,609,543.81
  5. Step 5: Solve for x
    x = 3,609,543.81/2,157.08
  6. Step 6: Final answer
    x = 1,673.35

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1.5x scale

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.