Home / 1,945.09-2,681.08-1,315.42

Finding the Fourth Proportional to 1,945.09, 2,681.08 and 1,315.42

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Solution

The fourth proportional to 1,945.09, 2,681.08 and 1,315.42 is: 1,813.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.09 : 2,681.08 = 1,315.42 : x
  2. Step 2: Convert to fraction form
    1,945.09/2,681.08 = 1,315.42/x
  3. Step 3: Cross multiply
    1,945.09x = 2,681.08 × 1,315.42
  4. Step 4: Simplify right side
    1,945.09x = 3,526,746.25
  5. Step 5: Solve for x
    x = 3,526,746.25/1,945.09
  6. Step 6: Final answer
    x = 1,813.15

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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.