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Finding the Fourth Proportional to 623.37, 859.54 and 399.01

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Solution

The fourth proportional to 623.37, 859.54 and 399.01 is: 550.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.37 : 859.54 = 399.01 : x
  2. Step 2: Convert to fraction form
    623.37/859.54 = 399.01/x
  3. Step 3: Cross multiply
    623.37x = 859.54 × 399.01
  4. Step 4: Simplify right side
    623.37x = 342,961.91
  5. Step 5: Solve for x
    x = 342,961.91/623.37
  6. Step 6: Final answer
    x = 550.17

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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.