Finding the Fourth Proportional to 1,119,745,124.80, 1,679,617,687.20 and 392,639,358.40
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Solution
The fourth proportional to 1,119,745,124.80, 1,679,617,687.20 and 392,639,358.40 is: 588,959,037.60
Step by Step Solution
- Step 1: Write the proportion equation
1,119,745,124.80 : 1,679,617,687.20 = 392,639,358.40 : x - Step 2: Convert to fraction form
1,119,745,124.80/1,679,617,687.20 = 392,639,358.40/x - Step 3: Cross multiply
1,119,745,124.80x = 1,679,617,687.20 × 392,639,358.40 - Step 4: Simplify right side
1,119,745,124.80x = 659,484,011,059,499,904 - Step 5: Solve for x
x = 659,484,011,059,499,904/1,119,745,124.80 - Step 6: Final answer
x = 588,959,037.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.