Finding the Fourth Proportional to 1,259,715,175.20, 1,889,572,762.80 and 646,361,402.40
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Solution
The fourth proportional to 1,259,715,175.20, 1,889,572,762.80 and 646,361,402.40 is: 969,542,103.60
Step by Step Solution
- Step 1: Write the proportion equation
1,259,715,175.20 : 1,889,572,762.80 = 646,361,402.40 : x - Step 2: Convert to fraction form
1,259,715,175.20/1,889,572,762.80 = 646,361,402.40/x - Step 3: Cross multiply
1,259,715,175.20x = 1,889,572,762.80 × 646,361,402.40 - Step 4: Simplify right side
1,259,715,175.20x = 1,221,346,900,900,250,368 - Step 5: Solve for x
x = 1,221,346,900,900,250,368/1,259,715,175.20 - Step 6: Final answer
x = 969,542,103.60
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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.