Finding the Fourth Proportional to 712,418.99, 983,160.47 and 390,159.68
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Solution
The fourth proportional to 712,418.99, 983,160.47 and 390,159.68 is: 538,432.55
Step by Step Solution
- Step 1: Write the proportion equation
712,418.99 : 983,160.47 = 390,159.68 : x - Step 2: Convert to fraction form
712,418.99/983,160.47 = 390,159.68/x - Step 3: Cross multiply
712,418.99x = 983,160.47 × 390,159.68 - Step 4: Simplify right side
712,418.99x = 383,589,572,413.05 - Step 5: Solve for x
x = 383,589,572,413.05/712,418.99 - Step 6: Final answer
x = 538,432.55
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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.