Finding the Fourth Proportional to 1,129,430.76, 1,558,636.74 and 620,128.68
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Solution
The fourth proportional to 1,129,430.76, 1,558,636.74 and 620,128.68 is: 855,789.82
Step by Step Solution
- Step 1: Write the proportion equation
1,129,430.76 : 1,558,636.74 = 620,128.68 : x - Step 2: Convert to fraction form
1,129,430.76/1,558,636.74 = 620,128.68/x - Step 3: Cross multiply
1,129,430.76x = 1,558,636.74 × 620,128.68 - Step 4: Simplify right side
1,129,430.76x = 966,555,344,175.70 - Step 5: Solve for x
x = 966,555,344,175.70/1,129,430.76 - Step 6: Final answer
x = 855,789.82
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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.