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Finding the Fourth Proportional to 380,985.44, 525,783.48 and 211,219.56

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Solution

The fourth proportional to 380,985.44, 525,783.48 and 211,219.56 is: 291,496.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,985.44 : 525,783.48 = 211,219.56 : x
  2. Step 2: Convert to fraction form
    380,985.44/525,783.48 = 211,219.56/x
  3. Step 3: Cross multiply
    380,985.44x = 525,783.48 × 211,219.56
  4. Step 4: Simplify right side
    380,985.44x = 111,055,754,508.80
  5. Step 5: Solve for x
    x = 111,055,754,508.80/380,985.44
  6. Step 6: Final answer
    x = 291,496.06

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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.