Finding the Fourth Proportional to 657,639.70, 921,628.70 and 657,639.70
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Solution
The fourth proportional to 657,639.70, 921,628.70 and 657,639.70 is: 921,628.70
Step by Step Solution
- Step 1: Write the proportion equation
657,639.70 : 921,628.70 = 657,639.70 : x - Step 2: Convert to fraction form
657,639.70/921,628.70 = 657,639.70/x - Step 3: Cross multiply
657,639.70x = 921,628.70 × 657,639.70 - Step 4: Simplify right side
657,639.70x = 606,099,621,779.39 - Step 5: Solve for x
x = 606,099,621,779.39/657,639.70 - Step 6: Final answer
x = 921,628.70
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.