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Finding the Fourth Proportional to 425.03, 637.55 and 279.69

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Solution

The fourth proportional to 425.03, 637.55 and 279.69 is: 419.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.03 : 637.55 = 279.69 : x
  2. Step 2: Convert to fraction form
    425.03/637.55 = 279.69/x
  3. Step 3: Cross multiply
    425.03x = 637.55 × 279.69
  4. Step 4: Simplify right side
    425.03x = 178,314.96
  5. Step 5: Solve for x
    x = 178,314.96/425.03
  6. Step 6: Final answer
    x = 419.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.