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Finding the Fourth Proportional to 622.64, 931.92 and 460.64

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Solution

The fourth proportional to 622.64, 931.92 and 460.64 is: 689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.64 : 931.92 = 460.64 : x
  2. Step 2: Convert to fraction form
    622.64/931.92 = 460.64/x
  3. Step 3: Cross multiply
    622.64x = 931.92 × 460.64
  4. Step 4: Simplify right side
    622.64x = 429,274.97
  5. Step 5: Solve for x
    x = 429,274.97/622.64
  6. Step 6: Final answer
    x = 689.45

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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.