Finding the Fourth Proportional to 1,281,038,875.20, 1,917,731,937.60 and 763,202,764.80
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Solution
The fourth proportional to 1,281,038,875.20, 1,917,731,937.60 and 763,202,764.80 is: 1,142,524,512.92
Step by Step Solution
- Step 1: Write the proportion equation
1,281,038,875.20 : 1,917,731,937.60 = 763,202,764.80 : x - Step 2: Convert to fraction form
1,281,038,875.20/1,917,731,937.60 = 763,202,764.80/x - Step 3: Cross multiply
1,281,038,875.20x = 1,917,731,937.60 × 763,202,764.80 - Step 4: Simplify right side
1,281,038,875.20x = 1,463,618,316,921,580,800 - Step 5: Solve for x
x = 1,463,618,316,921,580,800/1,281,038,875.20 - Step 6: Final answer
x = 1,142,524,512.92
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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.