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Finding the Fourth Proportional to 309,388.64, 426,930.24 and 171,571.52

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Solution

The fourth proportional to 309,388.64, 426,930.24 and 171,571.52 is: 236,754.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,388.64 : 426,930.24 = 171,571.52 : x
  2. Step 2: Convert to fraction form
    309,388.64/426,930.24 = 171,571.52/x
  3. Step 3: Cross multiply
    309,388.64x = 426,930.24 × 171,571.52
  4. Step 4: Simplify right side
    309,388.64x = 73,249,070,210.76
  5. Step 5: Solve for x
    x = 73,249,070,210.76/309,388.64
  6. Step 6: Final answer
    x = 236,754.23

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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.