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Finding the Fourth Proportional to 610.11, 839.70 and 485.37

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Solution

The fourth proportional to 610.11, 839.70 and 485.37 is: 668.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.11 : 839.70 = 485.37 : x
  2. Step 2: Convert to fraction form
    610.11/839.70 = 485.37/x
  3. Step 3: Cross multiply
    610.11x = 839.70 × 485.37
  4. Step 4: Simplify right side
    610.11x = 407,565.19
  5. Step 5: Solve for x
    x = 407,565.19/610.11
  6. Step 6: Final answer
    x = 668.02

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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.