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Finding the Fourth Proportional to 418,795.65, 628,141.50 and 134,463.78

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Solution

The fourth proportional to 418,795.65, 628,141.50 and 134,463.78 is: 201,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,795.65 : 628,141.50 = 134,463.78 : x
  2. Step 2: Convert to fraction form
    418,795.65/628,141.50 = 134,463.78/x
  3. Step 3: Cross multiply
    418,795.65x = 628,141.50 × 134,463.78
  4. Step 4: Simplify right side
    418,795.65x = 84,462,280,464.87
  5. Step 5: Solve for x
    x = 84,462,280,464.87/418,795.65
  6. Step 6: Final answer
    x = 201,678.98

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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.