Home / 2,816.40-3,886.28-1,557.28

Finding the Fourth Proportional to 2,816.40, 3,886.28 and 1,557.28

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Solution

The fourth proportional to 2,816.40, 3,886.28 and 1,557.28 is: 2,148.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.40 : 3,886.28 = 1,557.28 : x
  2. Step 2: Convert to fraction form
    2,816.40/3,886.28 = 1,557.28/x
  3. Step 3: Cross multiply
    2,816.40x = 3,886.28 × 1,557.28
  4. Step 4: Simplify right side
    2,816.40x = 6,052,026.12
  5. Step 5: Solve for x
    x = 6,052,026.12/2,816.40
  6. Step 6: Final answer
    x = 2,148.86

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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.