Finding the Fourth Proportional to 689,490,902.80, 1,034,236,354.20 and 431,501,885.20
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Solution
The fourth proportional to 689,490,902.80, 1,034,236,354.20 and 431,501,885.20 is: 647,252,827.80
Step by Step Solution
- Step 1: Write the proportion equation
689,490,902.80 : 1,034,236,354.20 = 431,501,885.20 : x - Step 2: Convert to fraction form
689,490,902.80/1,034,236,354.20 = 431,501,885.20/x - Step 3: Cross multiply
689,490,902.80x = 1,034,236,354.20 × 431,501,885.20 - Step 4: Simplify right side
689,490,902.80x = 446,274,936,579,674,944 - Step 5: Solve for x
x = 446,274,936,579,674,944/689,490,902.80 - Step 6: Final answer
x = 647,252,827.80
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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.