Finding the Fourth Proportional to 619,432.90, 855,183.84 and 390,186.70
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Solution
The fourth proportional to 619,432.90, 855,183.84 and 390,186.70 is: 538,688.47
Step by Step Solution
- Step 1: Write the proportion equation
619,432.90 : 855,183.84 = 390,186.70 : x - Step 2: Convert to fraction form
619,432.90/855,183.84 = 390,186.70/x - Step 3: Cross multiply
619,432.90x = 855,183.84 × 390,186.70 - Step 4: Simplify right side
619,432.90x = 333,681,360,422.93 - Step 5: Solve for x
x = 333,681,360,422.93/619,432.90 - Step 6: Final answer
x = 538,688.47
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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.