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Finding the Fourth Proportional to 636.32, 953.60 and 430.56

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Solution

The fourth proportional to 636.32, 953.60 and 430.56 is: 645.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.32 : 953.60 = 430.56 : x
  2. Step 2: Convert to fraction form
    636.32/953.60 = 430.56/x
  3. Step 3: Cross multiply
    636.32x = 953.60 × 430.56
  4. Step 4: Simplify right side
    636.32x = 410,582.02
  5. Step 5: Solve for x
    x = 410,582.02/636.32
  6. Step 6: Final answer
    x = 645.24

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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.