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Finding the Fourth Proportional to 667,175.32, 919,786.72 and 422,038.12

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Solution

The fourth proportional to 667,175.32, 919,786.72 and 422,038.12 is: 581,833.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,175.32 : 919,786.72 = 422,038.12 : x
  2. Step 2: Convert to fraction form
    667,175.32/919,786.72 = 422,038.12/x
  3. Step 3: Cross multiply
    667,175.32x = 919,786.72 × 422,038.12
  4. Step 4: Simplify right side
    667,175.32x = 388,185,058,109.77
  5. Step 5: Solve for x
    x = 388,185,058,109.77/667,175.32
  6. Step 6: Final answer
    x = 581,833.66

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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.