Finding the Fourth Proportional to 879.93, 1,319.93 and 392.99
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Solution
The fourth proportional to 879.93, 1,319.93 and 392.99 is: 589.49
Step by Step Solution
- Step 1: Write the proportion equation
879.93 : 1,319.93 = 392.99 : x - Step 2: Convert to fraction form
879.93/1,319.93 = 392.99/x - Step 3: Cross multiply
879.93x = 1,319.93 × 392.99 - Step 4: Simplify right side
879.93x = 518,712.20 - Step 5: Solve for x
x = 518,712.20/879.93 - Step 6: Final answer
x = 589.49
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.