Finding the Fourth Proportional to 768,672,624.80, 1,060,844,089.20 and 438,697,131.68
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Solution
The fourth proportional to 768,672,624.80, 1,060,844,089.20 and 438,697,131.68 is: 605,445,340.55
Step by Step Solution
- Step 1: Write the proportion equation
768,672,624.80 : 1,060,844,089.20 = 438,697,131.68 : x - Step 2: Convert to fraction form
768,672,624.80/1,060,844,089.20 = 438,697,131.68/x - Step 3: Cross multiply
768,672,624.80x = 1,060,844,089.20 × 438,697,131.68 - Step 4: Simplify right side
768,672,624.80x = 465,389,259,091,722,112 - Step 5: Solve for x
x = 465,389,259,091,722,112/768,672,624.80 - Step 6: Final answer
x = 605,445,340.55
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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.