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Finding the Fourth Proportional to 453.91, 680.87 and 430.83

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Solution

The fourth proportional to 453.91, 680.87 and 430.83 is: 646.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.91 : 680.87 = 430.83 : x
  2. Step 2: Convert to fraction form
    453.91/680.87 = 430.83/x
  3. Step 3: Cross multiply
    453.91x = 680.87 × 430.83
  4. Step 4: Simplify right side
    453.91x = 293,333.66
  5. Step 5: Solve for x
    x = 293,333.66/453.91
  6. Step 6: Final answer
    x = 646.24

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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.