Finding the Fourth Proportional to 478,386,601.20, 717,579,901.80 and 260,141,497.20
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Solution
The fourth proportional to 478,386,601.20, 717,579,901.80 and 260,141,497.20 is: 390,212,245.80
Step by Step Solution
- Step 1: Write the proportion equation
478,386,601.20 : 717,579,901.80 = 260,141,497.20 : x - Step 2: Convert to fraction form
478,386,601.20/717,579,901.80 = 260,141,497.20/x - Step 3: Cross multiply
478,386,601.20x = 717,579,901.80 × 260,141,497.20 - Step 4: Simplify right side
478,386,601.20x = 186,672,310,014,880,960 - Step 5: Solve for x
x = 186,672,310,014,880,960/478,386,601.20 - Step 6: Final answer
x = 390,212,245.80
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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.