Finding the Fourth Proportional to 869,121,105.20, 1,303,681,657.80 and 790,042,684.40
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Solution
The fourth proportional to 869,121,105.20, 1,303,681,657.80 and 790,042,684.40 is: 1,185,064,026.60
Step by Step Solution
- Step 1: Write the proportion equation
869,121,105.20 : 1,303,681,657.80 = 790,042,684.40 : x - Step 2: Convert to fraction form
869,121,105.20/1,303,681,657.80 = 790,042,684.40/x - Step 3: Cross multiply
869,121,105.20x = 1,303,681,657.80 × 790,042,684.40 - Step 4: Simplify right side
869,121,105.20x = 1,029,964,156,531,354,112 - Step 5: Solve for x
x = 1,029,964,156,531,354,112/869,121,105.20 - Step 6: Final answer
x = 1,185,064,026.60
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1.5x scale
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.