Finding the Fourth Proportional to 921,859,143.78, 1,272,088,713.57 and 519,950,744.70
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Solution
The fourth proportional to 921,859,143.78, 1,272,088,713.57 and 519,950,744.70 is: 717,488,651.50
Step by Step Solution
- Step 1: Write the proportion equation
921,859,143.78 : 1,272,088,713.57 = 519,950,744.70 : x - Step 2: Convert to fraction form
921,859,143.78/1,272,088,713.57 = 519,950,744.70/x - Step 3: Cross multiply
921,859,143.78x = 1,272,088,713.57 × 519,950,744.70 - Step 4: Simplify right side
921,859,143.78x = 661,423,473,945,186,432 - Step 5: Solve for x
x = 661,423,473,945,186,432/921,859,143.78 - Step 6: Final answer
x = 717,488,651.50
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1.5x scale
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.