Home / 1,328,725-1,993,087.50-430,917.76

Finding the Fourth Proportional to 1,328,725, 1,993,087.50 and 430,917.76

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Solution

The fourth proportional to 1,328,725, 1,993,087.50 and 430,917.76 is: 646,376.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,725 : 1,993,087.50 = 430,917.76 : x
  2. Step 2: Convert to fraction form
    1,328,725/1,993,087.50 = 430,917.76/x
  3. Step 3: Cross multiply
    1,328,725x = 1,993,087.50 × 430,917.76
  4. Step 4: Simplify right side
    1,328,725x = 858,856,800,984
  5. Step 5: Solve for x
    x = 858,856,800,984/1,328,725
  6. Step 6: Final answer
    x = 646,376.64

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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.