Finding the Fourth Proportional to 1,358,421,840.79, 1,874,628,488.63 and 771,743,169.43
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Solution
The fourth proportional to 1,358,421,840.79, 1,874,628,488.63 and 771,743,169.43 is: 1,065,009,180.42
Step by Step Solution
- Step 1: Write the proportion equation
1,358,421,840.79 : 1,874,628,488.63 = 771,743,169.43 : x - Step 2: Convert to fraction form
1,358,421,840.79/1,874,628,488.63 = 771,743,169.43/x - Step 3: Cross multiply
1,358,421,840.79x = 1,874,628,488.63 × 771,743,169.43 - Step 4: Simplify right side
1,358,421,840.79x = 1,446,731,731,319,086,848 - Step 5: Solve for x
x = 1,446,731,731,319,086,848/1,358,421,840.79 - Step 6: Final answer
x = 1,065,009,180.42
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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.