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Finding the Fourth Proportional to 613,634.90, 919,905.15 and 239,570.90

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Solution

The fourth proportional to 613,634.90, 919,905.15 and 239,570.90 is: 359,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,634.90 : 919,905.15 = 239,570.90 : x
  2. Step 2: Convert to fraction form
    613,634.90/919,905.15 = 239,570.90/x
  3. Step 3: Cross multiply
    613,634.90x = 919,905.15 × 239,570.90
  4. Step 4: Simplify right side
    613,634.90x = 220,382,504,700.14
  5. Step 5: Solve for x
    x = 220,382,504,700.14/613,634.90
  6. Step 6: Final answer
    x = 359,142.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.