Finding the Fourth Proportional to 389,783.12, 537,902.28 and 210,935.12
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Solution
The fourth proportional to 389,783.12, 537,902.28 and 210,935.12 is: 291,091.32
Step by Step Solution
- Step 1: Write the proportion equation
389,783.12 : 537,902.28 = 210,935.12 : x - Step 2: Convert to fraction form
389,783.12/537,902.28 = 210,935.12/x - Step 3: Cross multiply
389,783.12x = 537,902.28 × 210,935.12 - Step 4: Simplify right side
389,783.12x = 113,462,481,980.07 - Step 5: Solve for x
x = 113,462,481,980.07/389,783.12 - Step 6: Final answer
x = 291,091.32
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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.