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Finding the Fourth Proportional to 319,630.60, 479,740.38 and 161,969.32

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Solution

The fourth proportional to 319,630.60, 479,740.38 and 161,969.32 is: 243,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,630.60 : 479,740.38 = 161,969.32 : x
  2. Step 2: Convert to fraction form
    319,630.60/479,740.38 = 161,969.32/x
  3. Step 3: Cross multiply
    319,630.60x = 479,740.38 × 161,969.32
  4. Step 4: Simplify right side
    319,630.60x = 77,703,223,125.14
  5. Step 5: Solve for x
    x = 77,703,223,125.14/319,630.60
  6. Step 6: Final answer
    x = 243,103.20

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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.