Home / 1,942.25-2,678.87-1,312.47

Finding the Fourth Proportional to 1,942.25, 2,678.87 and 1,312.47

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Solution

The fourth proportional to 1,942.25, 2,678.87 and 1,312.47 is: 1,810.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.25 : 2,678.87 = 1,312.47 : x
  2. Step 2: Convert to fraction form
    1,942.25/2,678.87 = 1,312.47/x
  3. Step 3: Cross multiply
    1,942.25x = 2,678.87 × 1,312.47
  4. Step 4: Simplify right side
    1,942.25x = 3,515,939.79
  5. Step 5: Solve for x
    x = 3,515,939.79/1,942.25
  6. Step 6: Final answer
    x = 1,810.25

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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.