Finding the Fourth Proportional to 1,317,928,363.12, 1,818,768,926.40 and 723,207,645.36
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Solution
The fourth proportional to 1,317,928,363.12, 1,818,768,926.40 and 723,207,645.36 is: 998,041,797.66
Step by Step Solution
- Step 1: Write the proportion equation
1,317,928,363.12 : 1,818,768,926.40 = 723,207,645.36 : x - Step 2: Convert to fraction form
1,317,928,363.12/1,818,768,926.40 = 723,207,645.36/x - Step 3: Cross multiply
1,317,928,363.12x = 1,818,768,926.40 × 723,207,645.36 - Step 4: Simplify right side
1,317,928,363.12x = 1,315,347,592,715,679,232 - Step 5: Solve for x
x = 1,315,347,592,715,679,232/1,317,928,363.12 - Step 6: Final answer
x = 998,041,797.66
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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.