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Finding the Fourth Proportional to 319,400.90, 479,101.35 and 161,936.90

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Solution

The fourth proportional to 319,400.90, 479,101.35 and 161,936.90 is: 242,905.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,400.90 : 479,101.35 = 161,936.90 : x
  2. Step 2: Convert to fraction form
    319,400.90/479,101.35 = 161,936.90/x
  3. Step 3: Cross multiply
    319,400.90x = 479,101.35 × 161,936.90
  4. Step 4: Simplify right side
    319,400.90x = 77,584,187,404.82
  5. Step 5: Solve for x
    x = 77,584,187,404.82/319,400.90
  6. Step 6: Final answer
    x = 242,905.35

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Similar ratio
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1.5x scale

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.