Finding the Fourth Proportional to 839,809,328.20, 1,259,713,992.30 and 664,457,417.80
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Solution
The fourth proportional to 839,809,328.20, 1,259,713,992.30 and 664,457,417.80 is: 996,686,126.70
Step by Step Solution
- Step 1: Write the proportion equation
839,809,328.20 : 1,259,713,992.30 = 664,457,417.80 : x - Step 2: Convert to fraction form
839,809,328.20/1,259,713,992.30 = 664,457,417.80/x - Step 3: Cross multiply
839,809,328.20x = 1,259,713,992.30 × 664,457,417.80 - Step 4: Simplify right side
839,809,328.20x = 837,026,306,490,187,008 - Step 5: Solve for x
x = 837,026,306,490,187,008/839,809,328.20 - Step 6: Final answer
x = 996,686,126.70
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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.