Finding the Fourth Proportional to 686,669,722.71, 947,629,136.12 and 393,370,977.75
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Solution
The fourth proportional to 686,669,722.71, 947,629,136.12 and 393,370,977.75 is: 542,866,224.46
Step by Step Solution
- Step 1: Write the proportion equation
686,669,722.71 : 947,629,136.12 = 393,370,977.75 : x - Step 2: Convert to fraction form
686,669,722.71/947,629,136.12 = 393,370,977.75/x - Step 3: Cross multiply
686,669,722.71x = 947,629,136.12 × 393,370,977.75 - Step 4: Simplify right side
686,669,722.71x = 372,769,799,817,945,408 - Step 5: Solve for x
x = 372,769,799,817,945,408/686,669,722.71 - Step 6: Final answer
x = 542,866,224.46
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.