Finding the Fourth Proportional to 509,306,811.70, 763,960,217.55 and 509,306,811.70
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Solution
The fourth proportional to 509,306,811.70, 763,960,217.55 and 509,306,811.70 is: 763,960,217.55
Step by Step Solution
- Step 1: Write the proportion equation
509,306,811.70 : 763,960,217.55 = 509,306,811.70 : x - Step 2: Convert to fraction form
509,306,811.70/763,960,217.55 = 509,306,811.70/x - Step 3: Cross multiply
509,306,811.70x = 763,960,217.55 × 509,306,811.70 - Step 4: Simplify right side
509,306,811.70x = 389,090,142,666,028,864 - Step 5: Solve for x
x = 389,090,142,666,028,864/509,306,811.70 - Step 6: Final answer
x = 763,960,217.55
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Double scale
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Similar ratio
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1.5x scale
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.