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Finding the Fourth Proportional to 447,390.65, 617,406.47 and 243,442.59

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Solution

The fourth proportional to 447,390.65, 617,406.47 and 243,442.59 is: 335,954.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,390.65 : 617,406.47 = 243,442.59 : x
  2. Step 2: Convert to fraction form
    447,390.65/617,406.47 = 243,442.59/x
  3. Step 3: Cross multiply
    447,390.65x = 617,406.47 × 243,442.59
  4. Step 4: Simplify right side
    447,390.65x = 150,303,028,922.34
  5. Step 5: Solve for x
    x = 150,303,028,922.34/447,390.65
  6. Step 6: Final answer
    x = 335,954.79

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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.