Home / 2,815.56-4,225.20-1,256.40

Finding the Fourth Proportional to 2,815.56, 4,225.20 and 1,256.40

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Solution

The fourth proportional to 2,815.56, 4,225.20 and 1,256.40 is: 1,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.56 : 4,225.20 = 1,256.40 : x
  2. Step 2: Convert to fraction form
    2,815.56/4,225.20 = 1,256.40/x
  3. Step 3: Cross multiply
    2,815.56x = 4,225.20 × 1,256.40
  4. Step 4: Simplify right side
    2,815.56x = 5,308,541.28
  5. Step 5: Solve for x
    x = 5,308,541.28/2,815.56
  6. Step 6: Final answer
    x = 1,885.43

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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.