Finding the Fourth Proportional to 753,838,643.20, 1,129,918,156.80 and 293,623,859.20
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Solution
The fourth proportional to 753,838,643.20, 1,129,918,156.80 and 293,623,859.20 is: 440,108,679.45
Step by Step Solution
- Step 1: Write the proportion equation
753,838,643.20 : 1,129,918,156.80 = 293,623,859.20 : x - Step 2: Convert to fraction form
753,838,643.20/1,129,918,156.80 = 293,623,859.20/x - Step 3: Cross multiply
753,838,643.20x = 1,129,918,156.80 × 293,623,859.20 - Step 4: Simplify right side
753,838,643.20x = 331,770,929,779,766,720 - Step 5: Solve for x
x = 331,770,929,779,766,720/753,838,643.20 - Step 6: Final answer
x = 440,108,679.45
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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.