Finding the Fourth Proportional to 681,113.28, 939,853.92 and 390,709.68
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Solution
The fourth proportional to 681,113.28, 939,853.92 and 390,709.68 is: 539,132.09
Step by Step Solution
- Step 1: Write the proportion equation
681,113.28 : 939,853.92 = 390,709.68 : x - Step 2: Convert to fraction form
681,113.28/939,853.92 = 390,709.68/x - Step 3: Cross multiply
681,113.28x = 939,853.92 × 390,709.68 - Step 4: Simplify right side
681,113.28x = 367,210,024,329.95 - Step 5: Solve for x
x = 367,210,024,329.95/681,113.28 - Step 6: Final answer
x = 539,132.09
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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.