Home / 738,163.70-1,018,665.90-398,631.92

Finding the Fourth Proportional to 738,163.70, 1,018,665.90 and 398,631.92

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Solution

The fourth proportional to 738,163.70, 1,018,665.90 and 398,631.92 is: 550,112.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,163.70 : 1,018,665.90 = 398,631.92 : x
  2. Step 2: Convert to fraction form
    738,163.70/1,018,665.90 = 398,631.92/x
  3. Step 3: Cross multiply
    738,163.70x = 1,018,665.90 × 398,631.92
  4. Step 4: Simplify right side
    738,163.70x = 406,072,743,555.53
  5. Step 5: Solve for x
    x = 406,072,743,555.53/738,163.70
  6. Step 6: Final answer
    x = 550,112.05

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1.5x scale

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.