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Finding the Fourth Proportional to 621.54, 864.59 and 609.66

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Solution

The fourth proportional to 621.54, 864.59 and 609.66 is: 848.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.54 : 864.59 = 609.66 : x
  2. Step 2: Convert to fraction form
    621.54/864.59 = 609.66/x
  3. Step 3: Cross multiply
    621.54x = 864.59 × 609.66
  4. Step 4: Simplify right side
    621.54x = 527,102.89
  5. Step 5: Solve for x
    x = 527,102.89/621.54
  6. Step 6: Final answer
    x = 848.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.