Finding the Fourth Proportional to 620,272,415.70, 930,408,623.55 and 390,689,903.70
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Solution
The fourth proportional to 620,272,415.70, 930,408,623.55 and 390,689,903.70 is: 586,034,855.55
Step by Step Solution
- Step 1: Write the proportion equation
620,272,415.70 : 930,408,623.55 = 390,689,903.70 : x - Step 2: Convert to fraction form
620,272,415.70/930,408,623.55 = 390,689,903.70/x - Step 3: Cross multiply
620,272,415.70x = 930,408,623.55 × 390,689,903.70 - Step 4: Simplify right side
620,272,415.70x = 363,501,255,536,399,040 - Step 5: Solve for x
x = 363,501,255,536,399,040/620,272,415.70 - Step 6: Final answer
x = 586,034,855.55
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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.