Finding the Fourth Proportional to 1,217,966,828.47, 1,680,506,139.09 and 689,330,799.04
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Solution
The fourth proportional to 1,217,966,828.47, 1,680,506,139.09 and 689,330,799.04 is: 951,113,456.11
Step by Step Solution
- Step 1: Write the proportion equation
1,217,966,828.47 : 1,680,506,139.09 = 689,330,799.04 : x - Step 2: Convert to fraction form
1,217,966,828.47/1,680,506,139.09 = 689,330,799.04/x - Step 3: Cross multiply
1,217,966,828.47x = 1,680,506,139.09 × 689,330,799.04 - Step 4: Simplify right side
1,217,966,828.47x = 1,158,424,639,646,333,696 - Step 5: Solve for x
x = 1,158,424,639,646,333,696/1,217,966,828.47 - Step 6: Final answer
x = 951,113,456.11
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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.