Finding the Fourth Proportional to 1,398,679,554.99, 1,930,127,185.17 and 772,134,529.62
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Solution
The fourth proportional to 1,398,679,554.99, 1,930,127,185.17 and 772,134,529.62 is: 1,065,517,716.99
Step by Step Solution
- Step 1: Write the proportion equation
1,398,679,554.99 : 1,930,127,185.17 = 772,134,529.62 : x - Step 2: Convert to fraction form
1,398,679,554.99/1,930,127,185.17 = 772,134,529.62/x - Step 3: Cross multiply
1,398,679,554.99x = 1,930,127,185.17 × 772,134,529.62 - Step 4: Simplify right side
1,398,679,554.99x = 1,490,317,846,228,012,544 - Step 5: Solve for x
x = 1,490,317,846,228,012,544/1,398,679,554.99 - Step 6: Final answer
x = 1,065,517,716.99
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1.5x scale
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.