Finding the Fourth Proportional to 839,812,090.20, 1,259,718,135.30 and 513,294,739.80
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Solution
The fourth proportional to 839,812,090.20, 1,259,718,135.30 and 513,294,739.80 is: 769,942,109.70
Step by Step Solution
- Step 1: Write the proportion equation
839,812,090.20 : 1,259,718,135.30 = 513,294,739.80 : x - Step 2: Convert to fraction form
839,812,090.20/1,259,718,135.30 = 513,294,739.80/x - Step 3: Cross multiply
839,812,090.20x = 1,259,718,135.30 × 513,294,739.80 - Step 4: Simplify right side
839,812,090.20x = 646,606,692,480,154,624 - Step 5: Solve for x
x = 646,606,692,480,154,624/839,812,090.20 - Step 6: Final answer
x = 769,942,109.70
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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.