Finding the Fourth Proportional to 521,621,995.80, 782,432,993.70 and 368,566,987.80
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Solution
The fourth proportional to 521,621,995.80, 782,432,993.70 and 368,566,987.80 is: 552,850,481.70
Step by Step Solution
- Step 1: Write the proportion equation
521,621,995.80 : 782,432,993.70 = 368,566,987.80 : x - Step 2: Convert to fraction form
521,621,995.80/782,432,993.70 = 368,566,987.80/x - Step 3: Cross multiply
521,621,995.80x = 782,432,993.70 × 368,566,987.80 - Step 4: Simplify right side
521,621,995.80x = 288,378,971,643,345,408 - Step 5: Solve for x
x = 288,378,971,643,345,408/521,621,995.80 - Step 6: Final answer
x = 552,850,481.70
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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.