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Finding the Fourth Proportional to 423.03, 583.89 and 257.36

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Solution

The fourth proportional to 423.03, 583.89 and 257.36 is: 355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.03 : 583.89 = 257.36 : x
  2. Step 2: Convert to fraction form
    423.03/583.89 = 257.36/x
  3. Step 3: Cross multiply
    423.03x = 583.89 × 257.36
  4. Step 4: Simplify right side
    423.03x = 150,265.72
  5. Step 5: Solve for x
    x = 150,265.72/423.03
  6. Step 6: Final answer
    x = 355.21

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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.