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Finding the Fourth Proportional to 423.09, 583.67 and 257.27

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Solution

The fourth proportional to 423.09, 583.67 and 257.27 is: 354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.09 : 583.67 = 257.27 : x
  2. Step 2: Convert to fraction form
    423.09/583.67 = 257.27/x
  3. Step 3: Cross multiply
    423.09x = 583.67 × 257.27
  4. Step 4: Simplify right side
    423.09x = 150,158.51
  5. Step 5: Solve for x
    x = 150,158.51/423.09
  6. Step 6: Final answer
    x = 354.91

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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.