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Finding the Fourth Proportional to 617.64, 858 and 611.88

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Solution

The fourth proportional to 617.64, 858 and 611.88 is: 850.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.64 : 858 = 611.88 : x
  2. Step 2: Convert to fraction form
    617.64/858 = 611.88/x
  3. Step 3: Cross multiply
    617.64x = 858 × 611.88
  4. Step 4: Simplify right side
    617.64x = 524,993.04
  5. Step 5: Solve for x
    x = 524,993.04/617.64
  6. Step 6: Final answer
    x = 850.00

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.