Home / 738,371.75-1,018,953.42-398,840

Finding the Fourth Proportional to 738,371.75, 1,018,953.42 and 398,840

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Solution

The fourth proportional to 738,371.75, 1,018,953.42 and 398,840 is: 550,399.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,371.75 : 1,018,953.42 = 398,840 : x
  2. Step 2: Convert to fraction form
    738,371.75/1,018,953.42 = 398,840/x
  3. Step 3: Cross multiply
    738,371.75x = 1,018,953.42 × 398,840
  4. Step 4: Simplify right side
    738,371.75x = 406,399,382,032.80
  5. Step 5: Solve for x
    x = 406,399,382,032.80/738,371.75
  6. Step 6: Final answer
    x = 550,399.42

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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.