Finding the Fourth Proportional to 712,407.69, 983,121.93 and 390,124.08
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Solution
The fourth proportional to 712,407.69, 983,121.93 and 390,124.08 is: 538,370.86
Step by Step Solution
- Step 1: Write the proportion equation
712,407.69 : 983,121.93 = 390,124.08 : x - Step 2: Convert to fraction form
712,407.69/983,121.93 = 390,124.08/x - Step 3: Cross multiply
712,407.69x = 983,121.93 × 390,124.08 - Step 4: Simplify right side
712,407.69x = 383,539,538,469.07 - Step 5: Solve for x
x = 383,539,538,469.07/712,407.69 - Step 6: Final answer
x = 538,370.86
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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.