Finding the Fourth Proportional to 1,245,944,068.20, 1,868,916,102.30 and 518,838,301.80
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Solution
The fourth proportional to 1,245,944,068.20, 1,868,916,102.30 and 518,838,301.80 is: 778,257,452.70
Step by Step Solution
- Step 1: Write the proportion equation
1,245,944,068.20 : 1,868,916,102.30 = 518,838,301.80 : x - Step 2: Convert to fraction form
1,245,944,068.20/1,868,916,102.30 = 518,838,301.80/x - Step 3: Cross multiply
1,245,944,068.20x = 1,868,916,102.30 × 518,838,301.80 - Step 4: Simplify right side
1,245,944,068.20x = 969,665,256,724,007,040 - Step 5: Solve for x
x = 969,665,256,724,007,040/1,245,944,068.20 - Step 6: Final answer
x = 778,257,452.70
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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.