Finding the Fourth Proportional to 661,119,423.80, 991,679,135.70 and 620,808,639.80
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Solution
The fourth proportional to 661,119,423.80, 991,679,135.70 and 620,808,639.80 is: 931,212,959.70
Step by Step Solution
- Step 1: Write the proportion equation
661,119,423.80 : 991,679,135.70 = 620,808,639.80 : x - Step 2: Convert to fraction form
661,119,423.80/991,679,135.70 = 620,808,639.80/x - Step 3: Cross multiply
661,119,423.80x = 991,679,135.70 × 620,808,639.80 - Step 4: Simplify right side
661,119,423.80x = 615,642,975,351,956,608 - Step 5: Solve for x
x = 615,642,975,351,956,608/661,119,423.80 - Step 6: Final answer
x = 931,212,959.70
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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.