Finding the Fourth Proportional to 1,490,815,427.76, 2,057,417,335.08 and 821,758,963.68
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Solution
The fourth proportional to 1,490,815,427.76, 2,057,417,335.08 and 821,758,963.68 is: 1,134,078,106.28
Step by Step Solution
- Step 1: Write the proportion equation
1,490,815,427.76 : 2,057,417,335.08 = 821,758,963.68 : x - Step 2: Convert to fraction form
1,490,815,427.76/2,057,417,335.08 = 821,758,963.68/x - Step 3: Cross multiply
1,490,815,427.76x = 2,057,417,335.08 × 821,758,963.68 - Step 4: Simplify right side
1,490,815,427.76x = 1,690,701,137,132,608,000 - Step 5: Solve for x
x = 1,690,701,137,132,608,000/1,490,815,427.76 - Step 6: Final answer
x = 1,134,078,106.28
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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.