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Finding the Fourth Proportional to 601.61, 830.07 and 490.91

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Solution

The fourth proportional to 601.61, 830.07 and 490.91 is: 677.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.61 : 830.07 = 490.91 : x
  2. Step 2: Convert to fraction form
    601.61/830.07 = 490.91/x
  3. Step 3: Cross multiply
    601.61x = 830.07 × 490.91
  4. Step 4: Simplify right side
    601.61x = 407,489.66
  5. Step 5: Solve for x
    x = 407,489.66/601.61
  6. Step 6: Final answer
    x = 677.33

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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.