Finding the Fourth Proportional to 402,415.80, 603,623.70 and 390,751.80
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Solution
The fourth proportional to 402,415.80, 603,623.70 and 390,751.80 is: 586,127.70
Step by Step Solution
- Step 1: Write the proportion equation
402,415.80 : 603,623.70 = 390,751.80 : x - Step 2: Convert to fraction form
402,415.80/603,623.70 = 390,751.80/x - Step 3: Cross multiply
402,415.80x = 603,623.70 × 390,751.80 - Step 4: Simplify right side
402,415.80x = 235,867,047,297.66 - Step 5: Solve for x
x = 235,867,047,297.66/402,415.80 - Step 6: Final answer
x = 586,127.70
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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.