Finding the Fourth Proportional to 686,805.70, 1,030,208.55 and 651,813.70
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Solution
The fourth proportional to 686,805.70, 1,030,208.55 and 651,813.70 is: 977,720.55
Step by Step Solution
- Step 1: Write the proportion equation
686,805.70 : 1,030,208.55 = 651,813.70 : x - Step 2: Convert to fraction form
686,805.70/1,030,208.55 = 651,813.70/x - Step 3: Cross multiply
686,805.70x = 1,030,208.55 × 651,813.70 - Step 4: Simplify right side
686,805.70x = 671,504,046,747.14 - Step 5: Solve for x
x = 671,504,046,747.14/686,805.70 - Step 6: Final answer
x = 977,720.55
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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.