Home / 1,221,042.78-1,685,139.92-677,353.86

Finding the Fourth Proportional to 1,221,042.78, 1,685,139.92 and 677,353.86

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Solution

The fourth proportional to 1,221,042.78, 1,685,139.92 and 677,353.86 is: 934,804.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,042.78 : 1,685,139.92 = 677,353.86 : x
  2. Step 2: Convert to fraction form
    1,221,042.78/1,685,139.92 = 677,353.86/x
  3. Step 3: Cross multiply
    1,221,042.78x = 1,685,139.92 × 677,353.86
  4. Step 4: Simplify right side
    1,221,042.78x = 1,141,436,030,278.17
  5. Step 5: Solve for x
    x = 1,141,436,030,278.17/1,221,042.78
  6. Step 6: Final answer
    x = 934,804.29

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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.