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Finding the Fourth Proportional to 738,391.50, 1,018,980.81 and 398,859.75

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Solution

The fourth proportional to 738,391.50, 1,018,980.81 and 398,859.75 is: 550,426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,391.50 : 1,018,980.81 = 398,859.75 : x
  2. Step 2: Convert to fraction form
    738,391.50/1,018,980.81 = 398,859.75/x
  3. Step 3: Cross multiply
    738,391.50x = 1,018,980.81 × 398,859.75
  4. Step 4: Simplify right side
    738,391.50x = 406,430,431,131.40
  5. Step 5: Solve for x
    x = 406,430,431,131.40/738,391.50
  6. Step 6: Final answer
    x = 550,426.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.