Finding the Fourth Proportional to 715,303.53, 987,115.88 and 393,012.63
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Solution
The fourth proportional to 715,303.53, 987,115.88 and 393,012.63 is: 542,355.79
Step by Step Solution
- Step 1: Write the proportion equation
715,303.53 : 987,115.88 = 393,012.63 : x - Step 2: Convert to fraction form
715,303.53/987,115.88 = 393,012.63/x - Step 3: Cross multiply
715,303.53x = 987,115.88 × 393,012.63 - Step 4: Simplify right side
715,303.53x = 387,949,009,096.10 - Step 5: Solve for x
x = 387,949,009,096.10/715,303.53 - Step 6: Final answer
x = 542,355.79
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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.