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Finding the Fourth Proportional to 418,979.24, 628,567.26 and 138,496.48

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Solution

The fourth proportional to 418,979.24, 628,567.26 and 138,496.48 is: 207,777.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,979.24 : 628,567.26 = 138,496.48 : x
  2. Step 2: Convert to fraction form
    418,979.24/628,567.26 = 138,496.48/x
  3. Step 3: Cross multiply
    418,979.24x = 628,567.26 × 138,496.48
  4. Step 4: Simplify right side
    418,979.24x = 87,054,352,953.24
  5. Step 5: Solve for x
    x = 87,054,352,953.24/418,979.24
  6. Step 6: Final answer
    x = 207,777.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.