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Finding the Fourth Proportional to 430.40, 645.26 and 224.79

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Solution

The fourth proportional to 430.40, 645.26 and 224.79 is: 337.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.40 : 645.26 = 224.79 : x
  2. Step 2: Convert to fraction form
    430.40/645.26 = 224.79/x
  3. Step 3: Cross multiply
    430.40x = 645.26 × 224.79
  4. Step 4: Simplify right side
    430.40x = 145,046.87
  5. Step 5: Solve for x
    x = 145,046.87/430.40
  6. Step 6: Final answer
    x = 337.01

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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.