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Finding the Fourth Proportional to 622.83, 934.29 and 485.61

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Solution

The fourth proportional to 622.83, 934.29 and 485.61 is: 728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.83 : 934.29 = 485.61 : x
  2. Step 2: Convert to fraction form
    622.83/934.29 = 485.61/x
  3. Step 3: Cross multiply
    622.83x = 934.29 × 485.61
  4. Step 4: Simplify right side
    622.83x = 453,700.57
  5. Step 5: Solve for x
    x = 453,700.57/622.83
  6. Step 6: Final answer
    x = 728.45

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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.