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Finding the Fourth Proportional to 380,319.27, 569,649.90 and 190,448.49

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Solution

The fourth proportional to 380,319.27, 569,649.90 and 190,448.49 is: 285,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,319.27 : 569,649.90 = 190,448.49 : x
  2. Step 2: Convert to fraction form
    380,319.27/569,649.90 = 190,448.49/x
  3. Step 3: Cross multiply
    380,319.27x = 569,649.90 × 190,448.49
  4. Step 4: Simplify right side
    380,319.27x = 108,488,963,283.65
  5. Step 5: Solve for x
    x = 108,488,963,283.65/380,319.27
  6. Step 6: Final answer
    x = 285,257.60

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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.