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Finding the Fourth Proportional to 621.24, 931.47 and 377.40

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Solution

The fourth proportional to 621.24, 931.47 and 377.40 is: 565.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.24 : 931.47 = 377.40 : x
  2. Step 2: Convert to fraction form
    621.24/931.47 = 377.40/x
  3. Step 3: Cross multiply
    621.24x = 931.47 × 377.40
  4. Step 4: Simplify right side
    621.24x = 351,536.78
  5. Step 5: Solve for x
    x = 351,536.78/621.24
  6. Step 6: Final answer
    x = 565.86

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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.