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Finding the Fourth Proportional to 275,837.18, 380,655.64 and 154,978.39

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Solution

The fourth proportional to 275,837.18, 380,655.64 and 154,978.39 is: 213,870.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,837.18 : 380,655.64 = 154,978.39 : x
  2. Step 2: Convert to fraction form
    275,837.18/380,655.64 = 154,978.39/x
  3. Step 3: Cross multiply
    275,837.18x = 380,655.64 × 154,978.39
  4. Step 4: Simplify right side
    275,837.18x = 58,993,398,029.41
  5. Step 5: Solve for x
    x = 58,993,398,029.41/275,837.18
  6. Step 6: Final answer
    x = 213,870.37

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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.