Finding the Fourth Proportional to 1,272,424,466.70, 1,908,636,700.05 and 660,204,434.70
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Solution
The fourth proportional to 1,272,424,466.70, 1,908,636,700.05 and 660,204,434.70 is: 990,306,652.05
Step by Step Solution
- Step 1: Write the proportion equation
1,272,424,466.70 : 1,908,636,700.05 = 660,204,434.70 : x - Step 2: Convert to fraction form
1,272,424,466.70/1,908,636,700.05 = 660,204,434.70/x - Step 3: Cross multiply
1,272,424,466.70x = 1,908,636,700.05 × 660,204,434.70 - Step 4: Simplify right side
1,272,424,466.70x = 1,260,090,413,604,183,808 - Step 5: Solve for x
x = 1,260,090,413,604,183,808/1,272,424,466.70 - Step 6: Final answer
x = 990,306,652.05
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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.