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Finding the Fourth Proportional to 2,558.40, 3,532.80 and 2,212.80

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Solution

The fourth proportional to 2,558.40, 3,532.80 and 2,212.80 is: 3,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,558.40 : 3,532.80 = 2,212.80 : x
  2. Step 2: Convert to fraction form
    2,558.40/3,532.80 = 2,212.80/x
  3. Step 3: Cross multiply
    2,558.40x = 3,532.80 × 2,212.80
  4. Step 4: Simplify right side
    2,558.40x = 7,817,379.84
  5. Step 5: Solve for x
    x = 7,817,379.84/2,558.40
  6. Step 6: Final answer
    x = 3,055.57

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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.