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Finding the Fourth Proportional to 738,371, 1,018,952.39 and 398,839.25

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Solution

The fourth proportional to 738,371, 1,018,952.39 and 398,839.25 is: 550,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,371 : 1,018,952.39 = 398,839.25 : x
  2. Step 2: Convert to fraction form
    738,371/1,018,952.39 = 398,839.25/x
  3. Step 3: Cross multiply
    738,371x = 1,018,952.39 × 398,839.25
  4. Step 4: Simplify right side
    738,371x = 406,398,205,019.11
  5. Step 5: Solve for x
    x = 406,398,205,019.11/738,371
  6. Step 6: Final answer
    x = 550,398.38

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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.