Finding the Fourth Proportional to 611,706.10, 917,559.15 and 399,129.70
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Solution
The fourth proportional to 611,706.10, 917,559.15 and 399,129.70 is: 598,694.55
Step by Step Solution
- Step 1: Write the proportion equation
611,706.10 : 917,559.15 = 399,129.70 : x - Step 2: Convert to fraction form
611,706.10/917,559.15 = 399,129.70/x - Step 3: Cross multiply
611,706.10x = 917,559.15 × 399,129.70 - Step 4: Simplify right side
611,706.10x = 366,225,108,271.76 - Step 5: Solve for x
x = 366,225,108,271.76/611,706.10 - Step 6: Final answer
x = 598,694.55
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1.5x scale
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.