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Finding the Fourth Proportional to 380,618.92, 525,215.83 and 210,821.32

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Solution

The fourth proportional to 380,618.92, 525,215.83 and 210,821.32 is: 290,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,618.92 : 525,215.83 = 210,821.32 : x
  2. Step 2: Convert to fraction form
    380,618.92/525,215.83 = 210,821.32/x
  3. Step 3: Cross multiply
    380,618.92x = 525,215.83 × 210,821.32
  4. Step 4: Simplify right side
    380,618.92x = 110,726,691,412.36
  5. Step 5: Solve for x
    x = 110,726,691,412.36/380,618.92
  6. Step 6: Final answer
    x = 290,912.21

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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.