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Finding the Fourth Proportional to 621.11, 931.51 and 210.24

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Solution

The fourth proportional to 621.11, 931.51 and 210.24 is: 315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.11 : 931.51 = 210.24 : x
  2. Step 2: Convert to fraction form
    621.11/931.51 = 210.24/x
  3. Step 3: Cross multiply
    621.11x = 931.51 × 210.24
  4. Step 4: Simplify right side
    621.11x = 195,835.48
  5. Step 5: Solve for x
    x = 195,835.48/621.11
  6. Step 6: Final answer
    x = 315.30

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1.5x scale

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.