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Finding the Fourth Proportional to 623.08, 859.62 and 622.12

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Solution

The fourth proportional to 623.08, 859.62 and 622.12 is: 858.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.08 : 859.62 = 622.12 : x
  2. Step 2: Convert to fraction form
    623.08/859.62 = 622.12/x
  3. Step 3: Cross multiply
    623.08x = 859.62 × 622.12
  4. Step 4: Simplify right side
    623.08x = 534,786.79
  5. Step 5: Solve for x
    x = 534,786.79/623.08
  6. Step 6: Final answer
    x = 858.30

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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.