Finding the Fourth Proportional to 839,940,685.20, 1,259,911,027.80 and 686,885,677.20
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Solution
The fourth proportional to 839,940,685.20, 1,259,911,027.80 and 686,885,677.20 is: 1,030,328,515.80
Step by Step Solution
- Step 1: Write the proportion equation
839,940,685.20 : 1,259,911,027.80 = 686,885,677.20 : x - Step 2: Convert to fraction form
839,940,685.20/1,259,911,027.80 = 686,885,677.20/x - Step 3: Cross multiply
839,940,685.20x = 1,259,911,027.80 × 686,885,677.20 - Step 4: Simplify right side
839,940,685.20x = 865,414,839,542,151,040 - Step 5: Solve for x
x = 865,414,839,542,151,040/839,940,685.20 - Step 6: Final answer
x = 1,030,328,515.80
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Double scale
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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.