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Finding the Fourth Proportional to 622.20, 934.20 and 440.40

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Solution

The fourth proportional to 622.20, 934.20 and 440.40 is: 661.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.20 : 934.20 = 440.40 : x
  2. Step 2: Convert to fraction form
    622.20/934.20 = 440.40/x
  3. Step 3: Cross multiply
    622.20x = 934.20 × 440.40
  4. Step 4: Simplify right side
    622.20x = 411,421.68
  5. Step 5: Solve for x
    x = 411,421.68/622.20
  6. Step 6: Final answer
    x = 661.24

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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.