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Finding the Fourth Proportional to 306,381.34, 422,690.16 and 190,040.91

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Solution

The fourth proportional to 306,381.34, 422,690.16 and 190,040.91 is: 262,184.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,381.34 : 422,690.16 = 190,040.91 : x
  2. Step 2: Convert to fraction form
    306,381.34/422,690.16 = 190,040.91/x
  3. Step 3: Cross multiply
    306,381.34x = 422,690.16 × 190,040.91
  4. Step 4: Simplify right side
    306,381.34x = 80,328,422,654.45
  5. Step 5: Solve for x
    x = 80,328,422,654.45/306,381.34
  6. Step 6: Final answer
    x = 262,184.45

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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.