Finding the Fourth Proportional to 1,299,555,340.80, 1,948,363,531.20 and 781,864,483.20
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Solution
The fourth proportional to 1,299,555,340.80, 1,948,363,531.20 and 781,864,483.20 is: 1,172,213,446.85
Step by Step Solution
- Step 1: Write the proportion equation
1,299,555,340.80 : 1,948,363,531.20 = 781,864,483.20 : x - Step 2: Convert to fraction form
1,299,555,340.80/1,948,363,531.20 = 781,864,483.20/x - Step 3: Cross multiply
1,299,555,340.80x = 1,948,363,531.20 × 781,864,483.20 - Step 4: Simplify right side
1,299,555,340.80x = 1,523,356,245,407,415,296 - Step 5: Solve for x
x = 1,523,356,245,407,415,296/1,299,555,340.80 - Step 6: Final answer
x = 1,172,213,446.85
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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.