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Finding the Fourth Proportional to 430.56, 645.38 and 183.71

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Solution

The fourth proportional to 430.56, 645.38 and 183.71 is: 275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.56 : 645.38 = 183.71 : x
  2. Step 2: Convert to fraction form
    430.56/645.38 = 183.71/x
  3. Step 3: Cross multiply
    430.56x = 645.38 × 183.71
  4. Step 4: Simplify right side
    430.56x = 118,562.76
  5. Step 5: Solve for x
    x = 118,562.76/430.56
  6. Step 6: Final answer
    x = 275.37

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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.