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Finding the Fourth Proportional to 312,661.04, 431,305.84 and 190,190.88

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Solution

The fourth proportional to 312,661.04, 431,305.84 and 190,190.88 is: 262,362.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,661.04 : 431,305.84 = 190,190.88 : x
  2. Step 2: Convert to fraction form
    312,661.04/431,305.84 = 190,190.88/x
  3. Step 3: Cross multiply
    312,661.04x = 431,305.84 × 190,190.88
  4. Step 4: Simplify right side
    312,661.04x = 82,030,437,258.74
  5. Step 5: Solve for x
    x = 82,030,437,258.74/312,661.04
  6. Step 6: Final answer
    x = 262,362.20

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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.