Finding the Fourth Proportional to 885,661,911.30, 1,328,492,866.95 and 425,489,117.70
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Solution
The fourth proportional to 885,661,911.30, 1,328,492,866.95 and 425,489,117.70 is: 638,233,676.55
Step by Step Solution
- Step 1: Write the proportion equation
885,661,911.30 : 1,328,492,866.95 = 425,489,117.70 : x - Step 2: Convert to fraction form
885,661,911.30/1,328,492,866.95 = 425,489,117.70/x - Step 3: Cross multiply
885,661,911.30x = 1,328,492,866.95 × 425,489,117.70 - Step 4: Simplify right side
885,661,911.30x = 565,259,257,829,299,008 - Step 5: Solve for x
x = 565,259,257,829,299,008/885,661,911.30 - Step 6: Final answer
x = 638,233,676.55
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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.