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Finding the Fourth Proportional to 620.96, 931.50 and 610.79

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Solution

The fourth proportional to 620.96, 931.50 and 610.79 is: 916.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.96 : 931.50 = 610.79 : x
  2. Step 2: Convert to fraction form
    620.96/931.50 = 610.79/x
  3. Step 3: Cross multiply
    620.96x = 931.50 × 610.79
  4. Step 4: Simplify right side
    620.96x = 568,946.23
  5. Step 5: Solve for x
    x = 568,946.23/620.96
  6. Step 6: Final answer
    x = 916.24

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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.