Finding the Fourth Proportional to 285,312.23, 393,742.74 and 157,987.82
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Solution
The fourth proportional to 285,312.23, 393,742.74 and 157,987.82 is: 218,029.76
Step by Step Solution
- Step 1: Write the proportion equation
285,312.23 : 393,742.74 = 157,987.82 : x - Step 2: Convert to fraction form
285,312.23/393,742.74 = 157,987.82/x - Step 3: Cross multiply
285,312.23x = 393,742.74 × 157,987.82 - Step 4: Simplify right side
285,312.23x = 62,206,555,164.71 - Step 5: Solve for x
x = 62,206,555,164.71/285,312.23 - Step 6: Final answer
x = 218,029.76
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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.