Finding the Fourth Proportional to 543,203,840.50, 749,639,406.47 and 305,090,985.75
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Solution
The fourth proportional to 543,203,840.50, 749,639,406.47 and 305,090,985.75 is: 421,035,729.92
Step by Step Solution
- Step 1: Write the proportion equation
543,203,840.50 : 749,639,406.47 = 305,090,985.75 : x - Step 2: Convert to fraction form
543,203,840.50/749,639,406.47 = 305,090,985.75/x - Step 3: Cross multiply
543,203,840.50x = 749,639,406.47 × 305,090,985.75 - Step 4: Simplify right side
543,203,840.50x = 228,708,225,476,977,248 - Step 5: Solve for x
x = 228,708,225,476,977,248/543,203,840.50 - Step 6: Final answer
x = 421,035,729.92
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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.