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Finding the Fourth Proportional to 621.63, 931.40 and 296.28

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Solution

The fourth proportional to 621.63, 931.40 and 296.28 is: 443.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.63 : 931.40 = 296.28 : x
  2. Step 2: Convert to fraction form
    621.63/931.40 = 296.28/x
  3. Step 3: Cross multiply
    621.63x = 931.40 × 296.28
  4. Step 4: Simplify right side
    621.63x = 275,954.82
  5. Step 5: Solve for x
    x = 275,954.82/621.63
  6. Step 6: Final answer
    x = 443.92

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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.