Finding the Fourth Proportional to 1,152,415.76, 1,590,484.21 and 643,223.84
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Solution
The fourth proportional to 1,152,415.76, 1,590,484.21 and 643,223.84 is: 887,732.88
Step by Step Solution
- Step 1: Write the proportion equation
1,152,415.76 : 1,590,484.21 = 643,223.84 : x - Step 2: Convert to fraction form
1,152,415.76/1,590,484.21 = 643,223.84/x - Step 3: Cross multiply
1,152,415.76x = 1,590,484.21 × 643,223.84 - Step 4: Simplify right side
1,152,415.76x = 1,023,037,351,455.09 - Step 5: Solve for x
x = 1,023,037,351,455.09/1,152,415.76 - Step 6: Final answer
x = 887,732.88
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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.