Home / 1,374.20-1,896.58-815.16

Finding the Fourth Proportional to 1,374.20, 1,896.58 and 815.16

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Solution

The fourth proportional to 1,374.20, 1,896.58 and 815.16 is: 1,125.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.20 : 1,896.58 = 815.16 : x
  2. Step 2: Convert to fraction form
    1,374.20/1,896.58 = 815.16/x
  3. Step 3: Cross multiply
    1,374.20x = 1,896.58 × 815.16
  4. Step 4: Simplify right side
    1,374.20x = 1,546,016.15
  5. Step 5: Solve for x
    x = 1,546,016.15/1,374.20
  6. Step 6: Final answer
    x = 1,125.03

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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.