Finding the Fourth Proportional to 1,211,133,829.30, 1,817,551,049.55 and 521,535,987.70
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Solution
The fourth proportional to 1,211,133,829.30, 1,817,551,049.55 and 521,535,987.70 is: 782,670,138.42
Step by Step Solution
- Step 1: Write the proportion equation
1,211,133,829.30 : 1,817,551,049.55 = 521,535,987.70 : x - Step 2: Convert to fraction form
1,211,133,829.30/1,817,551,049.55 = 521,535,987.70/x - Step 3: Cross multiply
1,211,133,829.30x = 1,817,551,049.55 × 521,535,987.70 - Step 4: Simplify right side
1,211,133,829.30x = 947,918,281,822,230,784 - Step 5: Solve for x
x = 947,918,281,822,230,784/1,211,133,829.30 - Step 6: Final answer
x = 782,670,138.42
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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.