Finding the Fourth Proportional to 1,572,405.12, 2,169,979.20 and 857,013.12
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Solution
The fourth proportional to 1,572,405.12, 2,169,979.20 and 857,013.12 is: 1,182,710.88
Step by Step Solution
- Step 1: Write the proportion equation
1,572,405.12 : 2,169,979.20 = 857,013.12 : x - Step 2: Convert to fraction form
1,572,405.12/2,169,979.20 = 857,013.12/x - Step 3: Cross multiply
1,572,405.12x = 2,169,979.20 × 857,013.12 - Step 4: Simplify right side
1,572,405.12x = 1,859,700,644,527.10 - Step 5: Solve for x
x = 1,859,700,644,527.10/1,572,405.12 - Step 6: Final answer
x = 1,182,710.88
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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.