Finding the Fourth Proportional to 781,662,434.74, 1,172,531,358.72 and 257,019,921.07
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Solution
The fourth proportional to 781,662,434.74, 1,172,531,358.72 and 257,019,921.07 is: 385,542,279.99
Step by Step Solution
- Step 1: Write the proportion equation
781,662,434.74 : 1,172,531,358.72 = 257,019,921.07 : x - Step 2: Convert to fraction form
781,662,434.74/1,172,531,358.72 = 257,019,921.07/x - Step 3: Cross multiply
781,662,434.74x = 1,172,531,358.72 × 257,019,921.07 - Step 4: Simplify right side
781,662,434.74x = 301,363,917,267,382,912 - Step 5: Solve for x
x = 301,363,917,267,382,912/781,662,434.74 - Step 6: Final answer
x = 385,542,279.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.