Finding the Fourth Proportional to 1,048,896,439.80, 1,573,344,659.70 and 640,749,751.80
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Solution
The fourth proportional to 1,048,896,439.80, 1,573,344,659.70 and 640,749,751.80 is: 961,124,627.70
Step by Step Solution
- Step 1: Write the proportion equation
1,048,896,439.80 : 1,573,344,659.70 = 640,749,751.80 : x - Step 2: Convert to fraction form
1,048,896,439.80/1,573,344,659.70 = 640,749,751.80/x - Step 3: Cross multiply
1,048,896,439.80x = 1,573,344,659.70 × 640,749,751.80 - Step 4: Simplify right side
1,048,896,439.80x = 1,008,120,200,198,630,400 - Step 5: Solve for x
x = 1,008,120,200,198,630,400/1,048,896,439.80 - Step 6: Final answer
x = 961,124,627.70
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Double scale
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Similar ratio
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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.