Finding the Fourth Proportional to 1,191,705,659.68, 1,644,527,989.20 and 689,935,586.08
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Solution
The fourth proportional to 1,191,705,659.68, 1,644,527,989.20 and 689,935,586.08 is: 952,096,159.68
Step by Step Solution
- Step 1: Write the proportion equation
1,191,705,659.68 : 1,644,527,989.20 = 689,935,586.08 : x - Step 2: Convert to fraction form
1,191,705,659.68/1,644,527,989.20 = 689,935,586.08/x - Step 3: Cross multiply
1,191,705,659.68x = 1,644,527,989.20 × 689,935,586.08 - Step 4: Simplify right side
1,191,705,659.68x = 1,134,618,382,053,666,048 - Step 5: Solve for x
x = 1,134,618,382,053,666,048/1,191,705,659.68 - Step 6: Final answer
x = 952,096,159.68
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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.