Finding the Fourth Proportional to 918,117.70, 1,377,176.55 and 420,453.70
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Solution
The fourth proportional to 918,117.70, 1,377,176.55 and 420,453.70 is: 630,680.55
Step by Step Solution
- Step 1: Write the proportion equation
918,117.70 : 1,377,176.55 = 420,453.70 : x - Step 2: Convert to fraction form
918,117.70/1,377,176.55 = 420,453.70/x - Step 3: Cross multiply
918,117.70x = 1,377,176.55 × 420,453.70 - Step 4: Simplify right side
918,117.70x = 579,038,976,000.74 - Step 5: Solve for x
x = 579,038,976,000.74/918,117.70 - Step 6: Final answer
x = 630,680.55
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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.