Finding the Fourth Proportional to 1,267,429,638.49, 1,748,821,634.68 and 731,385,747.02
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Solution
The fourth proportional to 1,267,429,638.49, 1,748,821,634.68 and 731,385,747.02 is: 1,009,178,875.77
Step by Step Solution
- Step 1: Write the proportion equation
1,267,429,638.49 : 1,748,821,634.68 = 731,385,747.02 : x - Step 2: Convert to fraction form
1,267,429,638.49/1,748,821,634.68 = 731,385,747.02/x - Step 3: Cross multiply
1,267,429,638.49x = 1,748,821,634.68 × 731,385,747.02 - Step 4: Simplify right side
1,267,429,638.49x = 1,279,063,217,685,169,408 - Step 5: Solve for x
x = 1,279,063,217,685,169,408/1,267,429,638.49 - Step 6: Final answer
x = 1,009,178,875.77
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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.