Finding the Fourth Proportional to 1,291,631,102.65, 1,935,872,647.52 and 669,503,349.65
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Solution
The fourth proportional to 1,291,631,102.65, 1,935,872,647.52 and 669,503,349.65 is: 1,003,439,154.85
Step by Step Solution
- Step 1: Write the proportion equation
1,291,631,102.65 : 1,935,872,647.52 = 669,503,349.65 : x - Step 2: Convert to fraction form
1,291,631,102.65/1,935,872,647.52 = 669,503,349.65/x - Step 3: Cross multiply
1,291,631,102.65x = 1,935,872,647.52 × 669,503,349.65 - Step 4: Simplify right side
1,291,631,102.65x = 1,296,073,222,011,945,984 - Step 5: Solve for x
x = 1,296,073,222,011,945,984/1,291,631,102.65 - Step 6: Final answer
x = 1,003,439,154.85
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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.