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Finding the Fourth Proportional to 418,860.28, 628,329.32 and 169,561.72

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Solution

The fourth proportional to 418,860.28, 628,329.32 and 169,561.72 is: 254,358.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,860.28 : 628,329.32 = 169,561.72 : x
  2. Step 2: Convert to fraction form
    418,860.28/628,329.32 = 169,561.72/x
  3. Step 3: Cross multiply
    418,860.28x = 628,329.32 × 169,561.72
  4. Step 4: Simplify right side
    418,860.28x = 106,540,600,225.63
  5. Step 5: Solve for x
    x = 106,540,600,225.63/418,860.28
  6. Step 6: Final answer
    x = 254,358.33

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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.