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Finding the Fourth Proportional to 453.43, 678.52 and 392.77

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Solution

The fourth proportional to 453.43, 678.52 and 392.77 is: 587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.43 : 678.52 = 392.77 : x
  2. Step 2: Convert to fraction form
    453.43/678.52 = 392.77/x
  3. Step 3: Cross multiply
    453.43x = 678.52 × 392.77
  4. Step 4: Simplify right side
    453.43x = 266,502.30
  5. Step 5: Solve for x
    x = 266,502.30/453.43
  6. Step 6: Final answer
    x = 587.75

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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.