Finding the Fourth Proportional to 2,128,459.79, 3,190,790.76 and 780,307.56
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Solution
The fourth proportional to 2,128,459.79, 3,190,790.76 and 780,307.56 is: 1,169,765.18
Step by Step Solution
- Step 1: Write the proportion equation
2,128,459.79 : 3,190,790.76 = 780,307.56 : x - Step 2: Convert to fraction form
2,128,459.79/3,190,790.76 = 780,307.56/x - Step 3: Cross multiply
2,128,459.79x = 3,190,790.76 × 780,307.56 - Step 4: Simplify right side
2,128,459.79x = 2,489,798,152,406.15 - Step 5: Solve for x
x = 2,489,798,152,406.15/2,128,459.79 - Step 6: Final answer
x = 1,169,765.18
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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.