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Finding the Fourth Proportional to 418,890.50, 628,326.39 and 103,350.14

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Solution

The fourth proportional to 418,890.50, 628,326.39 and 103,350.14 is: 155,022.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,890.50 : 628,326.39 = 103,350.14 : x
  2. Step 2: Convert to fraction form
    418,890.50/628,326.39 = 103,350.14/x
  3. Step 3: Cross multiply
    418,890.50x = 628,326.39 × 103,350.14
  4. Step 4: Simplify right side
    418,890.50x = 64,937,620,372.19
  5. Step 5: Solve for x
    x = 64,937,620,372.19/418,890.50
  6. Step 6: Final answer
    x = 155,022.90

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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.