Finding the Fourth Proportional to 451,690.92, 621,769.05 and 390,409.20
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Solution
The fourth proportional to 451,690.92, 621,769.05 and 390,409.20 is: 537,412.52
Step by Step Solution
- Step 1: Write the proportion equation
451,690.92 : 621,769.05 = 390,409.20 : x - Step 2: Convert to fraction form
451,690.92/621,769.05 = 390,409.20/x - Step 3: Cross multiply
451,690.92x = 621,769.05 × 390,409.20 - Step 4: Simplify right side
451,690.92x = 242,744,357,395.26 - Step 5: Solve for x
x = 242,744,357,395.26/451,690.92 - Step 6: Final answer
x = 537,412.52
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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.