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Finding the Fourth Proportional to 451.08, 677.43 and 430.56

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Solution

The fourth proportional to 451.08, 677.43 and 430.56 is: 646.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.08 : 677.43 = 430.56 : x
  2. Step 2: Convert to fraction form
    451.08/677.43 = 430.56/x
  3. Step 3: Cross multiply
    451.08x = 677.43 × 430.56
  4. Step 4: Simplify right side
    451.08x = 291,674.26
  5. Step 5: Solve for x
    x = 291,674.26/451.08
  6. Step 6: Final answer
    x = 646.61

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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.