Finding the Fourth Proportional to 1,278,794,208.30, 1,918,191,312.45 and 865,545,686.70
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Solution
The fourth proportional to 1,278,794,208.30, 1,918,191,312.45 and 865,545,686.70 is: 1,298,318,530.05
Step by Step Solution
- Step 1: Write the proportion equation
1,278,794,208.30 : 1,918,191,312.45 = 865,545,686.70 : x - Step 2: Convert to fraction form
1,278,794,208.30/1,918,191,312.45 = 865,545,686.70/x - Step 3: Cross multiply
1,278,794,208.30x = 1,918,191,312.45 × 865,545,686.70 - Step 4: Simplify right side
1,278,794,208.30x = 1,660,282,216,756,509,696 - Step 5: Solve for x
x = 1,660,282,216,756,509,696/1,278,794,208.30 - Step 6: Final answer
x = 1,298,318,530.05
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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.