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Finding the Fourth Proportional to 443,859.76, 665,794.48 and 128,319.36

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Solution

The fourth proportional to 443,859.76, 665,794.48 and 128,319.36 is: 192,480.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,859.76 : 665,794.48 = 128,319.36 : x
  2. Step 2: Convert to fraction form
    443,859.76/665,794.48 = 128,319.36/x
  3. Step 3: Cross multiply
    443,859.76x = 665,794.48 × 128,319.36
  4. Step 4: Simplify right side
    443,859.76x = 85,434,321,565.13
  5. Step 5: Solve for x
    x = 85,434,321,565.13/443,859.76
  6. Step 6: Final answer
    x = 192,480.44

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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.