Finding the Fourth Proportional to 921,859,146.53, 1,272,088,717.36 and 519,950,747.45
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Solution
The fourth proportional to 921,859,146.53, 1,272,088,717.36 and 519,950,747.45 is: 717,488,655.29
Step by Step Solution
- Step 1: Write the proportion equation
921,859,146.53 : 1,272,088,717.36 = 519,950,747.45 : x - Step 2: Convert to fraction form
921,859,146.53/1,272,088,717.36 = 519,950,747.45/x - Step 3: Cross multiply
921,859,146.53x = 1,272,088,717.36 × 519,950,747.45 - Step 4: Simplify right side
921,859,146.53x = 661,423,479,414,043,776 - Step 5: Solve for x
x = 661,423,479,414,043,776/921,859,146.53 - Step 6: Final answer
x = 717,488,655.29
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Double scale
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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.