Finding the Fourth Proportional to 1,638,139,620.20, 2,457,209,430.30 and 603,742,857.80
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Solution
The fourth proportional to 1,638,139,620.20, 2,457,209,430.30 and 603,742,857.80 is: 905,614,286.70
Step by Step Solution
- Step 1: Write the proportion equation
1,638,139,620.20 : 2,457,209,430.30 = 603,742,857.80 : x - Step 2: Convert to fraction form
1,638,139,620.20/2,457,209,430.30 = 603,742,857.80/x - Step 3: Cross multiply
1,638,139,620.20x = 2,457,209,430.30 × 603,742,857.80 - Step 4: Simplify right side
1,638,139,620.20x = 1,483,522,643,662,432,000 - Step 5: Solve for x
x = 1,483,522,643,662,432,000/1,638,139,620.20 - Step 6: Final answer
x = 905,614,286.70
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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.