Finding the Fourth Proportional to 288,986,310.99, 398,802,153.24 and 156,827,278.80
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Solution
The fourth proportional to 288,986,310.99, 398,802,153.24 and 156,827,278.80 is: 216,422,211.34
Step by Step Solution
- Step 1: Write the proportion equation
288,986,310.99 : 398,802,153.24 = 156,827,278.80 : x - Step 2: Convert to fraction form
288,986,310.99/398,802,153.24 = 156,827,278.80/x - Step 3: Cross multiply
288,986,310.99x = 398,802,153.24 × 156,827,278.80 - Step 4: Simplify right side
288,986,310.99x = 62,543,056,472,209,808 - Step 5: Solve for x
x = 62,543,056,472,209,808/288,986,310.99 - Step 6: Final answer
x = 216,422,211.34
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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.