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Finding the Fourth Proportional to 380,607.48, 570,920.49 and 127,891.62

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Solution

The fourth proportional to 380,607.48, 570,920.49 and 127,891.62 is: 191,840.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,607.48 : 570,920.49 = 127,891.62 : x
  2. Step 2: Convert to fraction form
    380,607.48/570,920.49 = 127,891.62/x
  3. Step 3: Cross multiply
    380,607.48x = 570,920.49 × 127,891.62
  4. Step 4: Simplify right side
    380,607.48x = 73,015,946,357.29
  5. Step 5: Solve for x
    x = 73,015,946,357.29/380,607.48
  6. Step 6: Final answer
    x = 191,840.54

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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.