Home / 1,939.72-2,678.58-1,242.32

Finding the Fourth Proportional to 1,939.72, 2,678.58 and 1,242.32

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Solution

The fourth proportional to 1,939.72, 2,678.58 and 1,242.32 is: 1,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.72 : 2,678.58 = 1,242.32 : x
  2. Step 2: Convert to fraction form
    1,939.72/2,678.58 = 1,242.32/x
  3. Step 3: Cross multiply
    1,939.72x = 2,678.58 × 1,242.32
  4. Step 4: Simplify right side
    1,939.72x = 3,327,653.51
  5. Step 5: Solve for x
    x = 3,327,653.51/1,939.72
  6. Step 6: Final answer
    x = 1,715.53

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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.