Home / 1,911.03-2,637.12-1,071.78

Finding the Fourth Proportional to 1,911.03, 2,637.12 and 1,071.78

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Solution

The fourth proportional to 1,911.03, 2,637.12 and 1,071.78 is: 1,479.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.03 : 2,637.12 = 1,071.78 : x
  2. Step 2: Convert to fraction form
    1,911.03/2,637.12 = 1,071.78/x
  3. Step 3: Cross multiply
    1,911.03x = 2,637.12 × 1,071.78
  4. Step 4: Simplify right side
    1,911.03x = 2,826,412.47
  5. Step 5: Solve for x
    x = 2,826,412.47/1,911.03
  6. Step 6: Final answer
    x = 1,479.00

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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.