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Finding the Fourth Proportional to 401.79, 603.50 and 280.29

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Solution

The fourth proportional to 401.79, 603.50 and 280.29 is: 421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.79 : 603.50 = 280.29 : x
  2. Step 2: Convert to fraction form
    401.79/603.50 = 280.29/x
  3. Step 3: Cross multiply
    401.79x = 603.50 × 280.29
  4. Step 4: Simplify right side
    401.79x = 169,155.02
  5. Step 5: Solve for x
    x = 169,155.02/401.79
  6. Step 6: Final answer
    x = 421.00

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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.