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Finding the Fourth Proportional to 562.11, 840.91 and 485.89

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Solution

The fourth proportional to 562.11, 840.91 and 485.89 is: 726.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.11 : 840.91 = 485.89 : x
  2. Step 2: Convert to fraction form
    562.11/840.91 = 485.89/x
  3. Step 3: Cross multiply
    562.11x = 840.91 × 485.89
  4. Step 4: Simplify right side
    562.11x = 408,588.35
  5. Step 5: Solve for x
    x = 408,588.35/562.11
  6. Step 6: Final answer
    x = 726.89

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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.