Finding the Fourth Proportional to 1,243,205,070.54, 1,715,614,269.75 and 678,689,952.09
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Solution
The fourth proportional to 1,243,205,070.54, 1,715,614,269.75 and 678,689,952.09 is: 936,587,369.32
Step by Step Solution
- Step 1: Write the proportion equation
1,243,205,070.54 : 1,715,614,269.75 = 678,689,952.09 : x - Step 2: Convert to fraction form
1,243,205,070.54/1,715,614,269.75 = 678,689,952.09/x - Step 3: Cross multiply
1,243,205,070.54x = 1,715,614,269.75 × 678,689,952.09 - Step 4: Simplify right side
1,243,205,070.54x = 1,164,370,166,541,547,776 - Step 5: Solve for x
x = 1,164,370,166,541,547,776/1,243,205,070.54 - Step 6: Final answer
x = 936,587,369.32
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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.