Finding the Fourth Proportional to 426,547,810.70, 639,821,716.05 and 392,955,490.70
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Solution
The fourth proportional to 426,547,810.70, 639,821,716.05 and 392,955,490.70 is: 589,433,236.05
Step by Step Solution
- Step 1: Write the proportion equation
426,547,810.70 : 639,821,716.05 = 392,955,490.70 : x - Step 2: Convert to fraction form
426,547,810.70/639,821,716.05 = 392,955,490.70/x - Step 3: Cross multiply
426,547,810.70x = 639,821,716.05 × 392,955,490.70 - Step 4: Simplify right side
426,547,810.70x = 251,421,456,390,943,776 - Step 5: Solve for x
x = 251,421,456,390,943,776/426,547,810.70 - Step 6: Final answer
x = 589,433,236.05
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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.