Home / 2,312.81-3,194.30-1,555.28

Finding the Fourth Proportional to 2,312.81, 3,194.30 and 1,555.28

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Solution

The fourth proportional to 2,312.81, 3,194.30 and 1,555.28 is: 2,148.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.81 : 3,194.30 = 1,555.28 : x
  2. Step 2: Convert to fraction form
    2,312.81/3,194.30 = 1,555.28/x
  3. Step 3: Cross multiply
    2,312.81x = 3,194.30 × 1,555.28
  4. Step 4: Simplify right side
    2,312.81x = 4,968,030.80
  5. Step 5: Solve for x
    x = 4,968,030.80/2,312.81
  6. Step 6: Final answer
    x = 2,148.05

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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.