Home / 1,189,555.37-1,641,615.56-645,689.78

Finding the Fourth Proportional to 1,189,555.37, 1,641,615.56 and 645,689.78

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Solution

The fourth proportional to 1,189,555.37, 1,641,615.56 and 645,689.78 is: 891,067.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,555.37 : 1,641,615.56 = 645,689.78 : x
  2. Step 2: Convert to fraction form
    1,189,555.37/1,641,615.56 = 645,689.78/x
  3. Step 3: Cross multiply
    1,189,555.37x = 1,641,615.56 × 645,689.78
  4. Step 4: Simplify right side
    1,189,555.37x = 1,059,974,386,921.91
  5. Step 5: Solve for x
    x = 1,059,974,386,921.91/1,189,555.37
  6. Step 6: Final answer
    x = 891,067.72

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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.