Finding the Fourth Proportional to 1,327,720,353.30, 1,991,580,529.95 and 638,972,817.30
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Solution
The fourth proportional to 1,327,720,353.30, 1,991,580,529.95 and 638,972,817.30 is: 958,459,225.95
Step by Step Solution
- Step 1: Write the proportion equation
1,327,720,353.30 : 1,991,580,529.95 = 638,972,817.30 : x - Step 2: Convert to fraction form
1,327,720,353.30/1,991,580,529.95 = 638,972,817.30/x - Step 3: Cross multiply
1,327,720,353.30x = 1,991,580,529.95 × 638,972,817.30 - Step 4: Simplify right side
1,327,720,353.30x = 1,272,565,822,101,978,368 - Step 5: Solve for x
x = 1,272,565,822,101,978,368/1,327,720,353.30 - Step 6: Final answer
x = 958,459,225.95
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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.