Finding the Fourth Proportional to 689,768,139.12, 951,737,936.36 and 396,356,020.08
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Solution
The fourth proportional to 689,768,139.12, 951,737,936.36 and 396,356,020.08 is: 546,889,656.42
Step by Step Solution
- Step 1: Write the proportion equation
689,768,139.12 : 951,737,936.36 = 396,356,020.08 : x - Step 2: Convert to fraction form
689,768,139.12/951,737,936.36 = 396,356,020.08/x - Step 3: Cross multiply
689,768,139.12x = 951,737,936.36 × 396,356,020.08 - Step 4: Simplify right side
689,768,139.12x = 377,227,060,614,801,920 - Step 5: Solve for x
x = 377,227,060,614,801,920/689,768,139.12 - Step 6: Final answer
x = 546,889,656.42
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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.