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Finding the Fourth Proportional to 307,189.54, 423,920.59 and 171,221.95

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Solution

The fourth proportional to 307,189.54, 423,920.59 and 171,221.95 is: 236,285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,189.54 : 423,920.59 = 171,221.95 : x
  2. Step 2: Convert to fraction form
    307,189.54/423,920.59 = 171,221.95/x
  3. Step 3: Cross multiply
    307,189.54x = 423,920.59 × 171,221.95
  4. Step 4: Simplify right side
    307,189.54x = 72,584,510,064.95
  5. Step 5: Solve for x
    x = 72,584,510,064.95/307,189.54
  6. Step 6: Final answer
    x = 236,285.75

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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.