Finding the Fourth Proportional to 1,209,609,722.40, 1,813,139,125.20 and 472,394,767.20
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Solution
The fourth proportional to 1,209,609,722.40, 1,813,139,125.20 and 472,394,767.20 is: 708,094,039.83
Step by Step Solution
- Step 1: Write the proportion equation
1,209,609,722.40 : 1,813,139,125.20 = 472,394,767.20 : x - Step 2: Convert to fraction form
1,209,609,722.40/1,813,139,125.20 = 472,394,767.20/x - Step 3: Cross multiply
1,209,609,722.40x = 1,813,139,125.20 × 472,394,767.20 - Step 4: Simplify right side
1,209,609,722.40x = 856,517,434,950,065,664 - Step 5: Solve for x
x = 856,517,434,950,065,664/1,209,609,722.40 - Step 6: Final answer
x = 708,094,039.83
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.