Finding the Fourth Proportional to 691,985.93, 1,038,010.12 and 212,178.68
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Solution
The fourth proportional to 691,985.93, 1,038,010.12 and 212,178.68 is: 318,277.60
Step by Step Solution
- Step 1: Write the proportion equation
691,985.93 : 1,038,010.12 = 212,178.68 : x - Step 2: Convert to fraction form
691,985.93/1,038,010.12 = 212,178.68/x - Step 3: Cross multiply
691,985.93x = 1,038,010.12 × 212,178.68 - Step 4: Simplify right side
691,985.93x = 220,243,617,088.24 - Step 5: Solve for x
x = 220,243,617,088.24/691,985.93 - Step 6: Final answer
x = 318,277.60
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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.