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Finding the Fourth Proportional to 620.69, 931.04 and 245.42

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Solution

The fourth proportional to 620.69, 931.04 and 245.42 is: 368.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.69 : 931.04 = 245.42 : x
  2. Step 2: Convert to fraction form
    620.69/931.04 = 245.42/x
  3. Step 3: Cross multiply
    620.69x = 931.04 × 245.42
  4. Step 4: Simplify right side
    620.69x = 228,500.98
  5. Step 5: Solve for x
    x = 228,500.98/620.69
  6. Step 6: Final answer
    x = 368.14

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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.