Home / 1,187,100.78-1,638,282.20-670,902.38

Finding the Fourth Proportional to 1,187,100.78, 1,638,282.20 and 670,902.38

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Solution

The fourth proportional to 1,187,100.78, 1,638,282.20 and 670,902.38 is: 925,892.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,100.78 : 1,638,282.20 = 670,902.38 : x
  2. Step 2: Convert to fraction form
    1,187,100.78/1,638,282.20 = 670,902.38/x
  3. Step 3: Cross multiply
    1,187,100.78x = 1,638,282.20 × 670,902.38
  4. Step 4: Simplify right side
    1,187,100.78x = 1,099,127,421,689.27
  5. Step 5: Solve for x
    x = 1,099,127,421,689.27/1,187,100.78
  6. Step 6: Final answer
    x = 925,892.26

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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.