Finding the Fourth Proportional to 712,393.24, 983,107.78 and 390,133.08
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Solution
The fourth proportional to 712,393.24, 983,107.78 and 390,133.08 is: 538,386.45
Step by Step Solution
- Step 1: Write the proportion equation
712,393.24 : 983,107.78 = 390,133.08 : x - Step 2: Convert to fraction form
712,393.24/983,107.78 = 390,133.08/x - Step 3: Cross multiply
712,393.24x = 983,107.78 × 390,133.08 - Step 4: Simplify right side
712,393.24x = 383,542,866,183.36 - Step 5: Solve for x
x = 383,542,866,183.36/712,393.24 - Step 6: Final answer
x = 538,386.45
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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.