Finding the Fourth Proportional to 896,860,862.80, 1,345,291,294.20 and 858,118,813.90
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Solution
The fourth proportional to 896,860,862.80, 1,345,291,294.20 and 858,118,813.90 is: 1,287,178,220.85
Step by Step Solution
- Step 1: Write the proportion equation
896,860,862.80 : 1,345,291,294.20 = 858,118,813.90 : x - Step 2: Convert to fraction form
896,860,862.80/1,345,291,294.20 = 858,118,813.90/x - Step 3: Cross multiply
896,860,862.80x = 1,345,291,294.20 × 858,118,813.90 - Step 4: Simplify right side
896,860,862.80x = 1,154,419,769,728,899,840 - Step 5: Solve for x
x = 1,154,419,769,728,899,840/896,860,862.80 - Step 6: Final answer
x = 1,287,178,220.85
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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.