Finding the Fourth Proportional to 1,243,205,071.54, 1,715,614,271.13 and 678,689,953.09
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Solution
The fourth proportional to 1,243,205,071.54, 1,715,614,271.13 and 678,689,953.09 is: 936,587,370.70
Step by Step Solution
- Step 1: Write the proportion equation
1,243,205,071.54 : 1,715,614,271.13 = 678,689,953.09 : x - Step 2: Convert to fraction form
1,243,205,071.54/1,715,614,271.13 = 678,689,953.09/x - Step 3: Cross multiply
1,243,205,071.54x = 1,715,614,271.13 × 678,689,953.09 - Step 4: Simplify right side
1,243,205,071.54x = 1,164,370,169,193,754,368 - Step 5: Solve for x
x = 1,164,370,169,193,754,368/1,243,205,071.54 - Step 6: Final answer
x = 936,587,370.70
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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.