Finding the Fourth Proportional to 289,023.18, 398,988.36 and 217,430.52
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Solution
The fourth proportional to 289,023.18, 398,988.36 and 217,430.52 is: 300,156.71
Step by Step Solution
- Step 1: Write the proportion equation
289,023.18 : 398,988.36 = 217,430.52 : x - Step 2: Convert to fraction form
289,023.18/398,988.36 = 217,430.52/x - Step 3: Cross multiply
289,023.18x = 398,988.36 × 217,430.52 - Step 4: Simplify right side
289,023.18x = 86,752,246,588.75 - Step 5: Solve for x
x = 86,752,246,588.75/289,023.18 - Step 6: Final answer
x = 300,156.71
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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.