Finding the Fourth Proportional to 1,319,865.13, 1,820,472.77 and 1,211,319.21
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Solution
The fourth proportional to 1,319,865.13, 1,820,472.77 and 1,211,319.21 is: 1,670,756.80
Step by Step Solution
- Step 1: Write the proportion equation
1,319,865.13 : 1,820,472.77 = 1,211,319.21 : x - Step 2: Convert to fraction form
1,319,865.13/1,820,472.77 = 1,211,319.21/x - Step 3: Cross multiply
1,319,865.13x = 1,820,472.77 × 1,211,319.21 - Step 4: Simplify right side
1,319,865.13x = 2,205,173,637,197.82 - Step 5: Solve for x
x = 2,205,173,637,197.82/1,319,865.13 - Step 6: Final answer
x = 1,670,756.80
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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.