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Finding the Fourth Proportional to 447,258.78, 617,238.63 and 256,272.66

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Solution

The fourth proportional to 447,258.78, 617,238.63 and 256,272.66 is: 353,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,258.78 : 617,238.63 = 256,272.66 : x
  2. Step 2: Convert to fraction form
    447,258.78/617,238.63 = 256,272.66/x
  3. Step 3: Cross multiply
    447,258.78x = 617,238.63 × 256,272.66
  4. Step 4: Simplify right side
    447,258.78x = 158,181,385,564.86
  5. Step 5: Solve for x
    x = 158,181,385,564.86/447,258.78
  6. Step 6: Final answer
    x = 353,668.60

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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.