Finding the Fourth Proportional to 1,590,192,809.70, 2,385,289,214.55 and 620,844,425.70
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Solution
The fourth proportional to 1,590,192,809.70, 2,385,289,214.55 and 620,844,425.70 is: 931,266,638.55
Step by Step Solution
- Step 1: Write the proportion equation
1,590,192,809.70 : 2,385,289,214.55 = 620,844,425.70 : x - Step 2: Convert to fraction form
1,590,192,809.70/2,385,289,214.55 = 620,844,425.70/x - Step 3: Cross multiply
1,590,192,809.70x = 2,385,289,214.55 × 620,844,425.70 - Step 4: Simplify right side
1,590,192,809.70x = 1,480,893,512,535,698,944 - Step 5: Solve for x
x = 1,480,893,512,535,698,944/1,590,192,809.70 - Step 6: Final answer
x = 931,266,638.55
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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.