Home / 1,115,627.40-1,675,190.70-643,235.40

Finding the Fourth Proportional to 1,115,627.40, 1,675,190.70 and 643,235.40

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Solution

The fourth proportional to 1,115,627.40, 1,675,190.70 and 643,235.40 is: 965,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115,627.40 : 1,675,190.70 = 643,235.40 : x
  2. Step 2: Convert to fraction form
    1,115,627.40/1,675,190.70 = 643,235.40/x
  3. Step 3: Cross multiply
    1,115,627.40x = 1,675,190.70 × 643,235.40
  4. Step 4: Simplify right side
    1,115,627.40x = 1,077,541,959,990.78
  5. Step 5: Solve for x
    x = 1,077,541,959,990.78/1,115,627.40
  6. Step 6: Final answer
    x = 965,861.86

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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.