Finding the Fourth Proportional to 1,211,687,123.09, 1,817,394,419.84 and 326,437,908.76
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Solution
The fourth proportional to 1,211,687,123.09, 1,817,394,419.84 and 326,437,908.76 is: 489,620,152.34
Step by Step Solution
- Step 1: Write the proportion equation
1,211,687,123.09 : 1,817,394,419.84 = 326,437,908.76 : x - Step 2: Convert to fraction form
1,211,687,123.09/1,817,394,419.84 = 326,437,908.76/x - Step 3: Cross multiply
1,211,687,123.09x = 1,817,394,419.84 × 326,437,908.76 - Step 4: Simplify right side
1,211,687,123.09x = 593,266,433,798,487,424 - Step 5: Solve for x
x = 593,266,433,798,487,424/1,211,687,123.09 - Step 6: Final answer
x = 489,620,152.34
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Double scale
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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.