Finding the Fourth Proportional to 690,661.14, 953,122.21 and 396,358.77
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Solution
The fourth proportional to 690,661.14, 953,122.21 and 396,358.77 is: 546,980.75
Step by Step Solution
- Step 1: Write the proportion equation
690,661.14 : 953,122.21 = 396,358.77 : x - Step 2: Convert to fraction form
690,661.14/953,122.21 = 396,358.77/x - Step 3: Cross multiply
690,661.14x = 953,122.21 × 396,358.77 - Step 4: Simplify right side
690,661.14x = 377,778,345,824.39 - Step 5: Solve for x
x = 377,778,345,824.39/690,661.14 - Step 6: Final answer
x = 546,980.75
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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.