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Finding the Fourth Proportional to 601.62, 829.62 and 490.74

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Solution

The fourth proportional to 601.62, 829.62 and 490.74 is: 676.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.62 : 829.62 = 490.74 : x
  2. Step 2: Convert to fraction form
    601.62/829.62 = 490.74/x
  3. Step 3: Cross multiply
    601.62x = 829.62 × 490.74
  4. Step 4: Simplify right side
    601.62x = 407,127.72
  5. Step 5: Solve for x
    x = 407,127.72/601.62
  6. Step 6: Final answer
    x = 676.72

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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.