Home / 1,382.34-2,070.81-918.75

Finding the Fourth Proportional to 1,382.34, 2,070.81 and 918.75

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Solution

The fourth proportional to 1,382.34, 2,070.81 and 918.75 is: 1,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.34 : 2,070.81 = 918.75 : x
  2. Step 2: Convert to fraction form
    1,382.34/2,070.81 = 918.75/x
  3. Step 3: Cross multiply
    1,382.34x = 2,070.81 × 918.75
  4. Step 4: Simplify right side
    1,382.34x = 1,902,556.69
  5. Step 5: Solve for x
    x = 1,902,556.69/1,382.34
  6. Step 6: Final answer
    x = 1,376.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.