Finding the Fourth Proportional to 1,389,612.60, 1,917,228.24 and 777,668.13
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Solution
The fourth proportional to 1,389,612.60, 1,917,228.24 and 777,668.13 is: 1,072,937.38
Step by Step Solution
- Step 1: Write the proportion equation
1,389,612.60 : 1,917,228.24 = 777,668.13 : x - Step 2: Convert to fraction form
1,389,612.60/1,917,228.24 = 777,668.13/x - Step 3: Cross multiply
1,389,612.60x = 1,917,228.24 × 777,668.13 - Step 4: Simplify right side
1,389,612.60x = 1,490,967,300,183.99 - Step 5: Solve for x
x = 1,490,967,300,183.99/1,389,612.60 - Step 6: Final answer
x = 1,072,937.38
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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.