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Finding the Fourth Proportional to 380,809.97, 525,517.76 and 211,055.03

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Solution

The fourth proportional to 380,809.97, 525,517.76 and 211,055.03 is: 291,255.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,809.97 : 525,517.76 = 211,055.03 : x
  2. Step 2: Convert to fraction form
    380,809.97/525,517.76 = 211,055.03/x
  3. Step 3: Cross multiply
    380,809.97x = 525,517.76 × 211,055.03
  4. Step 4: Simplify right side
    380,809.97x = 110,913,166,473.07
  5. Step 5: Solve for x
    x = 110,913,166,473.07/380,809.97
  6. Step 6: Final answer
    x = 291,255.94

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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.