Finding the Fourth Proportional to 5,178,319.20, 7,145,931.75 and 2,886,430.68
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Solution
The fourth proportional to 5,178,319.20, 7,145,931.75 and 2,886,430.68 is: 3,983,191.43
Step by Step Solution
- Step 1: Write the proportion equation
5,178,319.20 : 7,145,931.75 = 2,886,430.68 : x - Step 2: Convert to fraction form
5,178,319.20/7,145,931.75 = 2,886,430.68/x - Step 3: Cross multiply
5,178,319.20x = 7,145,931.75 × 2,886,430.68 - Step 4: Simplify right side
5,178,319.20x = 20,626,236,640,386.09 - Step 5: Solve for x
x = 20,626,236,640,386.09/5,178,319.20 - Step 6: Final answer
x = 3,983,191.43
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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.