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Finding the Fourth Proportional to 488.61, 673.92 and 423

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Solution

The fourth proportional to 488.61, 673.92 and 423 is: 583.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.61 : 673.92 = 423 : x
  2. Step 2: Convert to fraction form
    488.61/673.92 = 423/x
  3. Step 3: Cross multiply
    488.61x = 673.92 × 423
  4. Step 4: Simplify right side
    488.61x = 285,068.16
  5. Step 5: Solve for x
    x = 285,068.16/488.61
  6. Step 6: Final answer
    x = 583.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.