Finding the Fourth Proportional to 854,180,185.20, 1,281,270,277.80 and 763,480,921.20
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Solution
The fourth proportional to 854,180,185.20, 1,281,270,277.80 and 763,480,921.20 is: 1,145,221,381.80
Step by Step Solution
- Step 1: Write the proportion equation
854,180,185.20 : 1,281,270,277.80 = 763,480,921.20 : x - Step 2: Convert to fraction form
854,180,185.20/1,281,270,277.80 = 763,480,921.20/x - Step 3: Cross multiply
854,180,185.20x = 1,281,270,277.80 × 763,480,921.20 - Step 4: Simplify right side
854,180,185.20x = 978,225,412,000,923,904 - Step 5: Solve for x
x = 978,225,412,000,923,904/854,180,185.20 - Step 6: Final answer
x = 1,145,221,381.80
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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.