Finding the Fourth Proportional to 1,379,536,238.20, 1,903,475,817.56 and 792,712,000.12
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Solution
The fourth proportional to 1,379,536,238.20, 1,903,475,817.56 and 792,712,000.12 is: 1,093,779,257.65
Step by Step Solution
- Step 1: Write the proportion equation
1,379,536,238.20 : 1,903,475,817.56 = 792,712,000.12 : x - Step 2: Convert to fraction form
1,379,536,238.20/1,903,475,817.56 = 792,712,000.12/x - Step 3: Cross multiply
1,379,536,238.20x = 1,903,475,817.56 × 792,712,000.12 - Step 4: Simplify right side
1,379,536,238.20x = 1,508,908,122,518,039,808 - Step 5: Solve for x
x = 1,508,908,122,518,039,808/1,379,536,238.20 - Step 6: Final answer
x = 1,093,779,257.65
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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.