Finding the Fourth Proportional to 908,078,415.10, 1,253,148,201.36 and 490,390,663.50
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Solution
The fourth proportional to 908,078,415.10, 1,253,148,201.36 and 490,390,663.50 is: 676,739,109.43
Step by Step Solution
- Step 1: Write the proportion equation
908,078,415.10 : 1,253,148,201.36 = 490,390,663.50 : x - Step 2: Convert to fraction form
908,078,415.10/1,253,148,201.36 = 490,390,663.50/x - Step 3: Cross multiply
908,078,415.10x = 1,253,148,201.36 × 490,390,663.50 - Step 4: Simplify right side
908,078,415.10x = 614,532,177,928,761,984 - Step 5: Solve for x
x = 614,532,177,928,761,984/908,078,415.10 - Step 6: Final answer
x = 676,739,109.43
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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.