Home / 1,911.39-2,637.87-1,072.17

Finding the Fourth Proportional to 1,911.39, 2,637.87 and 1,072.17

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Solution

The fourth proportional to 1,911.39, 2,637.87 and 1,072.17 is: 1,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.39 : 2,637.87 = 1,072.17 : x
  2. Step 2: Convert to fraction form
    1,911.39/2,637.87 = 1,072.17/x
  3. Step 3: Cross multiply
    1,911.39x = 2,637.87 × 1,072.17
  4. Step 4: Simplify right side
    1,911.39x = 2,828,231.17
  5. Step 5: Solve for x
    x = 2,828,231.17/1,911.39
  6. Step 6: Final answer
    x = 1,479.68

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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.