Home / 2,921.16-4,381.80-1,071.28

Finding the Fourth Proportional to 2,921.16, 4,381.80 and 1,071.28

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Solution

The fourth proportional to 2,921.16, 4,381.80 and 1,071.28 is: 1,606.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.16 : 4,381.80 = 1,071.28 : x
  2. Step 2: Convert to fraction form
    2,921.16/4,381.80 = 1,071.28/x
  3. Step 3: Cross multiply
    2,921.16x = 4,381.80 × 1,071.28
  4. Step 4: Simplify right side
    2,921.16x = 4,694,111.52
  5. Step 5: Solve for x
    x = 4,694,111.52/2,921.16
  6. Step 6: Final answer
    x = 1,606.93

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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.