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Finding the Fourth Proportional to 642,661.62, 886,670.37 and 370,693.05

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Solution

The fourth proportional to 642,661.62, 886,670.37 and 370,693.05 is: 511,439.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,661.62 : 886,670.37 = 370,693.05 : x
  2. Step 2: Convert to fraction form
    642,661.62/886,670.37 = 370,693.05/x
  3. Step 3: Cross multiply
    642,661.62x = 886,670.37 × 370,693.05
  4. Step 4: Simplify right side
    642,661.62x = 328,682,543,799.93
  5. Step 5: Solve for x
    x = 328,682,543,799.93/642,661.62
  6. Step 6: Final answer
    x = 511,439.51

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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.