Finding the Fourth Proportional to 639,759,352.80, 959,639,029.20 and 542,904,230.55
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Solution
The fourth proportional to 639,759,352.80, 959,639,029.20 and 542,904,230.55 is: 814,356,345.83
Step by Step Solution
- Step 1: Write the proportion equation
639,759,352.80 : 959,639,029.20 = 542,904,230.55 : x - Step 2: Convert to fraction form
639,759,352.80/959,639,029.20 = 542,904,230.55/x - Step 3: Cross multiply
639,759,352.80x = 959,639,029.20 × 542,904,230.55 - Step 4: Simplify right side
639,759,352.80x = 520,992,088,753,574,976 - Step 5: Solve for x
x = 520,992,088,753,574,976/639,759,352.80 - Step 6: Final answer
x = 814,356,345.83
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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.