Home / 2,312.28-3,191.58-1,485.72

Finding the Fourth Proportional to 2,312.28, 3,191.58 and 1,485.72

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Solution

The fourth proportional to 2,312.28, 3,191.58 and 1,485.72 is: 2,050.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.28 : 3,191.58 = 1,485.72 : x
  2. Step 2: Convert to fraction form
    2,312.28/3,191.58 = 1,485.72/x
  3. Step 3: Cross multiply
    2,312.28x = 3,191.58 × 1,485.72
  4. Step 4: Simplify right side
    2,312.28x = 4,741,794.24
  5. Step 5: Solve for x
    x = 4,741,794.24/2,312.28
  6. Step 6: Final answer
    x = 2,050.70

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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.