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Finding the Fourth Proportional to 621.54, 931.98 and 274.47

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Solution

The fourth proportional to 621.54, 931.98 and 274.47 is: 411.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.54 : 931.98 = 274.47 : x
  2. Step 2: Convert to fraction form
    621.54/931.98 = 274.47/x
  3. Step 3: Cross multiply
    621.54x = 931.98 × 274.47
  4. Step 4: Simplify right side
    621.54x = 255,800.55
  5. Step 5: Solve for x
    x = 255,800.55/621.54
  6. Step 6: Final answer
    x = 411.56

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.