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Finding the Fourth Proportional to 628,896,916.80, 943,345,375.20 and 399,881,275.20

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Solution

The fourth proportional to 628,896,916.80, 943,345,375.20 and 399,881,275.20 is: 599,821,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,896,916.80 : 943,345,375.20 = 399,881,275.20 : x
  2. Step 2: Convert to fraction form
    628,896,916.80/943,345,375.20 = 399,881,275.20/x
  3. Step 3: Cross multiply
    628,896,916.80x = 943,345,375.20 × 399,881,275.20
  4. Step 4: Simplify right side
    628,896,916.80x = 377,226,151,588,998,464
  5. Step 5: Solve for x
    x = 377,226,151,588,998,464/628,896,916.80
  6. Step 6: Final answer
    x = 599,821,912.80

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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.