Home / 2,815.47-4,212.60-1,728.47

Finding the Fourth Proportional to 2,815.47, 4,212.60 and 1,728.47

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Solution

The fourth proportional to 2,815.47, 4,212.60 and 1,728.47 is: 2,586.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.47 : 4,212.60 = 1,728.47 : x
  2. Step 2: Convert to fraction form
    2,815.47/4,212.60 = 1,728.47/x
  3. Step 3: Cross multiply
    2,815.47x = 4,212.60 × 1,728.47
  4. Step 4: Simplify right side
    2,815.47x = 7,281,331.66
  5. Step 5: Solve for x
    x = 7,281,331.66/2,815.47
  6. Step 6: Final answer
    x = 2,586.19

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1.5x scale

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.