Finding the Fourth Proportional to 515,402,278.70, 711,249,165.89 and 280,448,891.09
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Solution
The fourth proportional to 515,402,278.70, 711,249,165.89 and 280,448,891.09 is: 387,016,216.47
Step by Step Solution
- Step 1: Write the proportion equation
515,402,278.70 : 711,249,165.89 = 280,448,891.09 : x - Step 2: Convert to fraction form
515,402,278.70/711,249,165.89 = 280,448,891.09/x - Step 3: Cross multiply
515,402,278.70x = 711,249,165.89 × 280,448,891.09 - Step 4: Simplify right side
515,402,278.70x = 199,469,039,862,537,920 - Step 5: Solve for x
x = 199,469,039,862,537,920/515,402,278.70 - Step 6: Final answer
x = 387,016,216.47
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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.