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Finding the Fourth Proportional to 307,346.40, 424,140.12 and 171,388.80

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Solution

The fourth proportional to 307,346.40, 424,140.12 and 171,388.80 is: 236,517.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,346.40 : 424,140.12 = 171,388.80 : x
  2. Step 2: Convert to fraction form
    307,346.40/424,140.12 = 171,388.80/x
  3. Step 3: Cross multiply
    307,346.40x = 424,140.12 × 171,388.80
  4. Step 4: Simplify right side
    307,346.40x = 72,692,866,198.66
  5. Step 5: Solve for x
    x = 72,692,866,198.66/307,346.40
  6. Step 6: Final answer
    x = 236,517.71

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1.5x scale

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.