Finding the Fourth Proportional to 1,279,411,646.28, 1,919,117,469.36 and 310,063,262.28
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Solution
The fourth proportional to 1,279,411,646.28, 1,919,117,469.36 and 310,063,262.28 is: 465,094,893.41
Step by Step Solution
- Step 1: Write the proportion equation
1,279,411,646.28 : 1,919,117,469.36 = 310,063,262.28 : x - Step 2: Convert to fraction form
1,279,411,646.28/1,919,117,469.36 = 310,063,262.28/x - Step 3: Cross multiply
1,279,411,646.28x = 1,919,117,469.36 × 310,063,262.28 - Step 4: Simplify right side
1,279,411,646.28x = 595,047,823,248,299,520 - Step 5: Solve for x
x = 595,047,823,248,299,520/1,279,411,646.28 - Step 6: Final answer
x = 465,094,893.41
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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.