Finding the Fourth Proportional to 643,658.76, 888,246.21 and 357,178.20
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Solution
The fourth proportional to 643,658.76, 888,246.21 and 357,178.20 is: 492,904.32
Step by Step Solution
- Step 1: Write the proportion equation
643,658.76 : 888,246.21 = 357,178.20 : x - Step 2: Convert to fraction form
643,658.76/888,246.21 = 357,178.20/x - Step 3: Cross multiply
643,658.76x = 888,246.21 × 357,178.20 - Step 4: Simplify right side
643,658.76x = 317,262,182,444.62 - Step 5: Solve for x
x = 317,262,182,444.62/643,658.76 - Step 6: Final answer
x = 492,904.32
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Double scale
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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.