Finding the Fourth Proportional to 1,221,440,998,062.40, 1,685,665,128,386.40 and 672,732,193,885.26
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Solution
The fourth proportional to 1,221,440,998,062.40, 1,685,665,128,386.40 and 672,732,193,885.26 is: 928,412,589,534.95
Step by Step Solution
- Step 1: Write the proportion equation
1,221,440,998,062.40 : 1,685,665,128,386.40 = 672,732,193,885.26 : x - Step 2: Convert to fraction form
1,221,440,998,062.40/1,685,665,128,386.40 = 672,732,193,885.26/x - Step 3: Cross multiply
1,221,440,998,062.40x = 1,685,665,128,386.40 × 672,732,193,885.26 - Step 4: Simplify right side
1,221,440,998,062.40x = 1,134,001,199,975,261,337,026,560 - Step 5: Solve for x
x = 1,134,001,199,975,261,337,026,560/1,221,440,998,062.40 - Step 6: Final answer
x = 928,412,589,534.95
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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.