Finding the Fourth Proportional to 389,207,810.99, 537,106,432.16 and 219,697,728.59
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Solution
The fourth proportional to 389,207,810.99, 537,106,432.16 and 219,697,728.59 is: 303,182,669.57
Step by Step Solution
- Step 1: Write the proportion equation
389,207,810.99 : 537,106,432.16 = 219,697,728.59 : x - Step 2: Convert to fraction form
389,207,810.99/537,106,432.16 = 219,697,728.59/x - Step 3: Cross multiply
389,207,810.99x = 537,106,432.16 × 219,697,728.59 - Step 4: Simplify right side
389,207,810.99x = 118,001,063,152,846,912 - Step 5: Solve for x
x = 118,001,063,152,846,912/389,207,810.99 - Step 6: Final answer
x = 303,182,669.57
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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.