Finding the Fourth Proportional to 1,990,657,430.40, 2,985,986,145.60 and 536,781,820.80
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Solution
The fourth proportional to 1,990,657,430.40, 2,985,986,145.60 and 536,781,820.80 is: 805,172,731.20
Step by Step Solution
- Step 1: Write the proportion equation
1,990,657,430.40 : 2,985,986,145.60 = 536,781,820.80 : x - Step 2: Convert to fraction form
1,990,657,430.40/2,985,986,145.60 = 536,781,820.80/x - Step 3: Cross multiply
1,990,657,430.40x = 2,985,986,145.60 × 536,781,820.80 - Step 4: Simplify right side
1,990,657,430.40x = 1,602,823,080,118,742,016 - Step 5: Solve for x
x = 1,602,823,080,118,742,016/1,990,657,430.40 - Step 6: Final answer
x = 805,172,731.20
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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.