Home / 1,911.28-2,637.52-1,071.92

Finding the Fourth Proportional to 1,911.28, 2,637.52 and 1,071.92

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Solution

The fourth proportional to 1,911.28, 2,637.52 and 1,071.92 is: 1,479.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.28 : 2,637.52 = 1,071.92 : x
  2. Step 2: Convert to fraction form
    1,911.28/2,637.52 = 1,071.92/x
  3. Step 3: Cross multiply
    1,911.28x = 2,637.52 × 1,071.92
  4. Step 4: Simplify right side
    1,911.28x = 2,827,210.44
  5. Step 5: Solve for x
    x = 2,827,210.44/1,911.28
  6. Step 6: Final answer
    x = 1,479.22

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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.