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Finding the Fourth Proportional to 326,105.29, 488,928.78 and 143,649.53

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Solution

The fourth proportional to 326,105.29, 488,928.78 and 143,649.53 is: 215,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,105.29 : 488,928.78 = 143,649.53 : x
  2. Step 2: Convert to fraction form
    326,105.29/488,928.78 = 143,649.53/x
  3. Step 3: Cross multiply
    326,105.29x = 488,928.78 × 143,649.53
  4. Step 4: Simplify right side
    326,105.29x = 70,234,387,868.21
  5. Step 5: Solve for x
    x = 70,234,387,868.21/326,105.29
  6. Step 6: Final answer
    x = 215,373.35

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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.