Finding the Fourth Proportional to 291,645.12, 402,470.16 and 157,509.12
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Solution
The fourth proportional to 291,645.12, 402,470.16 and 157,509.12 is: 217,362.53
Step by Step Solution
- Step 1: Write the proportion equation
291,645.12 : 402,470.16 = 157,509.12 : x - Step 2: Convert to fraction form
291,645.12/402,470.16 = 157,509.12/x - Step 3: Cross multiply
291,645.12x = 402,470.16 × 157,509.12 - Step 4: Simplify right side
291,645.12x = 63,392,720,727.86 - Step 5: Solve for x
x = 63,392,720,727.86/291,645.12 - Step 6: Final answer
x = 217,362.53
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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.