Finding the Fourth Proportional to 553,843.60, 764,307.12 and 312,129.88
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Solution
The fourth proportional to 553,843.60, 764,307.12 and 312,129.88 is: 430,740.90
Step by Step Solution
- Step 1: Write the proportion equation
553,843.60 : 764,307.12 = 312,129.88 : x - Step 2: Convert to fraction form
553,843.60/764,307.12 = 312,129.88/x - Step 3: Cross multiply
553,843.60x = 764,307.12 × 312,129.88 - Step 4: Simplify right side
553,843.60x = 238,563,089,648.75 - Step 5: Solve for x
x = 238,563,089,648.75/553,843.60 - Step 6: Final answer
x = 430,740.90
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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.