Finding the Fourth Proportional to 553,497.30, 763,724.79 and 311,728.14
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Solution
The fourth proportional to 553,497.30, 763,724.79 and 311,728.14 is: 430,127.68
Step by Step Solution
- Step 1: Write the proportion equation
553,497.30 : 763,724.79 = 311,728.14 : x - Step 2: Convert to fraction form
553,497.30/763,724.79 = 311,728.14/x - Step 3: Cross multiply
553,497.30x = 763,724.79 × 311,728.14 - Step 4: Simplify right side
553,497.30x = 238,074,508,258.59 - Step 5: Solve for x
x = 238,074,508,258.59/553,497.30 - Step 6: Final answer
x = 430,127.68
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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.