Finding the Fourth Proportional to 1,221,440,998,064.90, 1,685,665,128,389.70 and 672,732,193,887.68
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Solution
The fourth proportional to 1,221,440,998,064.90, 1,685,665,128,389.70 and 672,732,193,887.68 is: 928,412,589,538.20
Step by Step Solution
- Step 1: Write the proportion equation
1,221,440,998,064.90 : 1,685,665,128,389.70 = 672,732,193,887.68 : x - Step 2: Convert to fraction form
1,221,440,998,064.90/1,685,665,128,389.70 = 672,732,193,887.68/x - Step 3: Cross multiply
1,221,440,998,064.90x = 1,685,665,128,389.70 × 672,732,193,887.68 - Step 4: Simplify right side
1,221,440,998,064.90x = 1,134,001,199,981,560,711,872,512 - Step 5: Solve for x
x = 1,134,001,199,981,560,711,872,512/1,221,440,998,064.90 - Step 6: Final answer
x = 928,412,589,538.20
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.