Finding the Fourth Proportional to 553,986.08, 764,478.60 and 312,318.80
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Solution
The fourth proportional to 553,986.08, 764,478.60 and 312,318.80 is: 430,987.43
Step by Step Solution
- Step 1: Write the proportion equation
553,986.08 : 764,478.60 = 312,318.80 : x - Step 2: Convert to fraction form
553,986.08/764,478.60 = 312,318.80/x - Step 3: Cross multiply
553,986.08x = 764,478.60 × 312,318.80 - Step 4: Simplify right side
553,986.08x = 238,761,038,977.68 - Step 5: Solve for x
x = 238,761,038,977.68/553,986.08 - Step 6: Final answer
x = 430,987.43
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1.5x scale
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.