Finding the Fourth Proportional to 1,223,999,481.92, 1,689,179,215.19 and 688,319,736.93
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Solution
The fourth proportional to 1,223,999,481.92, 1,689,179,215.19 and 688,319,736.93 is: 949,914,938.86
Step by Step Solution
- Step 1: Write the proportion equation
1,223,999,481.92 : 1,689,179,215.19 = 688,319,736.93 : x - Step 2: Convert to fraction form
1,223,999,481.92/1,689,179,215.19 = 688,319,736.93/x - Step 3: Cross multiply
1,223,999,481.92x = 1,689,179,215.19 × 688,319,736.93 - Step 4: Simplify right side
1,223,999,481.92x = 1,162,695,393,023,762,944 - Step 5: Solve for x
x = 1,162,695,393,023,762,944/1,223,999,481.92 - Step 6: Final answer
x = 949,914,938.86
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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.